The axis of a circle is its diameter.

圆的轴线是其直。

The circle has a diameter of 6 inches.

这个圆直六英寸。

The pond has a diameter of three hundred metres.

这池塘直有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的直就是指它的内，如上图。

A diameter passes through the center of a circle.

直从圆心穿过。

The diameter and the circumference of a circle correlate.

圆的直与圆周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳米及亚微米颗粒粒的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿而规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个直1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔管道设计成压力均衡的变管道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技术及算术统计平均的方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，固定，直小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔直45左右，将范围设置为中间调（图片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙的尺寸很小,水溶液能渗入到孔隙,能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外管的成椭圆是最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微粒构成，其直在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在过去，外围直仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工的方法,它能提高内孔的尺寸、状精度和改善表面粗糙度。

The axis of a circle is its diameter.

的轴线是其。

The circle has a diameter of 6 inches.

这个六英寸。

The pond has a diameter of three hundred metres.

这池塘有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的就是指它的内，如上图。

A diameter passes through the center of a circle.

从心穿过。

The diameter and the circumference of a circle correlate.

的与周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳米及亚微米颗粒粒的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔管道设计成压力均衡的变管道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技术及算术统计平均的方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结通常坚硬，不固定，小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔45左右，将范围设置为中间调（图片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙的尺寸很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外管的成椭形是最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微粒构成，其在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在过去，外围仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工的方法,它能提高内孔的尺寸、形状精度和改善表面粗糙度。

The axis of a circle is its diameter.

轴线是其。

The circle has a diameter of 6 inches.

这个六英寸。

The pond has a diameter of three hundred metres.

这池塘有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点就是指它内，如上图。

A diameter passes through the center of a circle.

从心穿。

The diameter and the circumference of a circle correlate.

与周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳米及亚微米颗粒粒有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小口因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星赤道附近，座落著一个1100公里火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔道设计成压力均衡变道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技术及算术统计平均方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，不固定，小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔45左右，将范围设置为中间调（图片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙尺寸很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外成椭形是最小且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微粒构成，其在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在去，外围仅0.35公分细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工方法,它能提高内孔尺寸、形状精度和改善表面粗糙度。

The axis of a circle is its diameter.

圆的轴线是其直。

The circle has a diameter of 6 inches.

这个圆直六英寸。

The pond has a diameter of three hundred metres.

这池塘直有三百。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的直就是指它的内，如上图。

A diameter passes through the center of a circle.

直从圆心穿过。

The diameter and the circumference of a circle correlate.

圆的直与圆周有相互关系。

This microscope magnifies 40 diameters.

这台显镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳及颗粒粒的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个直1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把灌多孔管道设计成压力均衡的变管道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显摄像技术及算术统计平均的方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，不固定，直小于1厘。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔直45左右，将范设置为中间调（图片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙的尺寸很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫外管的成椭圆形是最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物粒构成，其直在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在过去，外直仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工的方法,它能提高内孔的尺寸、形状精和改善表面粗糙。

The axis of a circle is its diameter.

圆的轴线是其。

The circle has a diameter of 6 inches.

这个圆英。

The pond has a diameter of three hundred metres.

这池塘有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的就是指它的内，如上图。

A diameter passes through the center of a circle.

从圆心穿过。

The diameter and the circumference of a circle correlate.

圆的与圆周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳米及亚微米颗粒粒的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔管道设计成压力均衡的变管道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技术及算术统计平均的方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，不固定，小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔45左右，将范围设置为中间调（图片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙的尺很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外管的成椭圆形是最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微粒构成，其在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在过去，外围仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工的方法,它能提高内孔的尺、形状精度和改善表面粗糙度。

The axis of a circle is its diameter.

的轴线是其直。

The circle has a diameter of 6 inches.

这个直六英寸。

The pond has a diameter of three hundred metres.

这池塘直有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的直就是指它的内，如上图。

A diameter passes through the center of a circle.

直从心穿过。

The diameter and the circumference of a circle correlate.

的直周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳米及亚微米颗的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个直1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔管道设计成压力均衡的变管道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技术及算术统计平均的方法表征柴油乳化液水滴。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，不固定，直小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔直45左右，将范围设置为中间调（图片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙的尺寸很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外管的成椭形是最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微构成，其直在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在过去，外围直仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工的方法,它能提高内孔的尺寸、形状精度和改善表面粗糙度。

The axis of a circle is its diameter.

圆的轴线是其。

The circle has a diameter of 6 inches.

这个圆六英寸。

The pond has a diameter of three hundred metres.

这池塘有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的就是指它的内，如。

A diameter passes through the center of a circle.

从圆心穿过。

The diameter and the circumference of a circle correlate.

圆的与圆周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳米及亚微米颗粒粒的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔管道设计成压力均衡的变管道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技术及算术统计平均的方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，不固定，小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔45左右，将范围设置为中间调（片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙的尺寸很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外管的成椭圆形是最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微粒构成，其在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在过去，外围仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种内孔精整加工的方法,它能提高内孔的尺寸、形状精度和改善表面粗糙度。

The axis of a circle is its diameter.

圆的轴直。

The circle has a diameter of 6 inches.

这个圆直六英寸。

The pond has a diameter of three hundred metres.

这池塘直有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的直就指它的内，如上图。

A diameter passes through the center of a circle.

直从圆心穿过。

The diameter and the circumference of a circle correlate.

圆的直与圆周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技测量纳米及亚微米颗粒粒的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个直1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔管道设计成压力衡的变管道，已众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技及算统计的方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，不固定，直小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔直45左右，将范围设置为中间调（图片中为阴影，应该作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二孔隙的尺寸很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外管的成椭圆形最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微粒构成，直在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在过去，外围直仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法一种内孔精整加工的方法,它能提高内孔的尺寸、形状精度和改善表面粗糙度。

The axis of a circle is its diameter.

圆的轴线是其。

The circle has a diameter of 6 inches.

这个圆六英寸。

The pond has a diameter of three hundred metres.

这池塘有三百米。

The hardpoint's diameter is defined by the inner diameter, as seen in the image.

挂载点的就是指它的，如上图。

A diameter passes through the center of a circle.

从圆。

The diameter and the circumference of a circle correlate.

圆的与圆周有相互关系。

This microscope magnifies 40 diameters.

这台显微镜能放大40倍。

The dynamic light scattering is an effective method to measure grain diameter in nanon and submicron.

动态光散射技术是测量纳米及亚微米颗粒粒的有效方法。

The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿而呈现不规则。

Near the Martian equator sits a volcano 1,100 kilometers in diameter named Syrtis Major.

在火星的赤道附近，座落著一个1100公里的火山，称为大三角。

It is unanimous to design the multihole micro-irrigation pipe to variable diameter pipe withuniform pressure.

把微灌多孔管道设计成压力均衡的变管道，已是众人所望。

The water droplet diameter in diesel emulsion was characterized with microphotography and arithmetic statistic mean method.

利用显微摄像技术及算术统计平均的方法表征柴油乳化液水滴粒。

These shotty nodes are usually firm, not fixed, and are less than a centimeter in diameter.

这些似弹丸样结节通常坚硬，不固定，小于1厘米。

Due to the brittleness of fiber, the godet and wingding rollers with large diameter were used.

由于光纤比较脆,采用了大尺寸的导丝盘和卷绕筒。

Select Burn Tool, select brush diameter around 45, set Range to Midtones, set Exposure to around 8-10%.

选择加深工具，画笔45左右，将范围设置为中间调（图片中为阴影，应该是作者写错了），将曝光设置为8-10%。

The pore diameter was very tiny so that it could prevent hydrotropic solution entering into the pore.

二是孔隙的尺寸很小,水溶液不能渗入到孔隙,不能到达基体。

It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外管的成椭圆形是最小的且难以测量。

Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由石英、长石、云母等矿物微粒构成，其在0.05~2mm之间。

In the past, Thinnet coaxial cable with an outside diameter of only 0.35 cm was used in Ethernet networks.

在去，外围仅0.35公分的细同轴电缆被用在乙太网路。

Ballizing is a method of finishing on internal diameter.It can give improvement in dimensional tolerance, roundness and surface finish.

球推压法是一种孔精整加工的方法,它能提高孔的尺寸、形状精度和改善表面粗糙度。