伸缩的

Step 1: Center the secondary mirror on the axis of the focuser drawtube.

把副镜中央置于调焦管中轴。

Expansion joints of various kinds are fitted on steam pipes.

样接头被安装在蒸气管道上了。

Expansion joints of various kinds are fitted on gas mains.

样接头被安装在煤气总管道上了。

This paper is about contrast and analysis of digital and analogic data of parallel observation with water tube tiltmeter and tensometer in Shandong province.

对山东省水管仪、仪数字化和模拟观测资料进行了对比分析。

Telescopic and sliding on the movement of the way, Shmoo able to smash through the rock to their own, small holes infiltration, or ev...

靠和滑动移动式，Shmoo可以粉碎自己以穿过岩石、渗透小孔，甚至改变颜色来吸收泡泡。

Actin and myoglobulin are the compositions building muscles' stretching function. Microtubulin is the basic substance which provides the flagellum and cilium the function of movement.

肌动蛋白及肌球蛋白乃是构成肌肉机构组成部分，微管蛋白是赋予鞭毛及纤毛能动基本物质。

Based on the idea of magnetic strain, the model of magnetic strain was used to analysis the magnetoelastic buckling of cantilevered ferromagnetic plate in transverse magnetic field.

基于磁致概念，采用磁致应变模型，对横向磁场中铁磁体磁弹性屈曲临界磁场这一问题进行了研究。

Project Description: Gulfstream Aerospace and NASA's Dryden Flight Research Center tested the structural integrity of a telescopic 'Quiet Spike' sonic boom mitigator on a NASA F-15B testbed aircraft.

湾流航空和宇航局德莱顿飞行研究中心测试结构完整性'安静斯派克'爆音缓和对美国航天局F - 15B条试验飞机。