Sheets of postage stamps are perforated.

一张张的邮票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全是导致下肢静脉曲张术后复发的主要原因。

Sheets of postage stamps are perforated.

一邮票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全是导致下肢静脉曲术后主要原因。

Sheets of postage stamps are perforated.

一张张的邮票都打过接缝。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全是导致下肢静脉曲张术后复发的主要原因。

Sheets of postage stamps are perforated.

一张张的邮票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全下肢静脉曲张术后复发的主要原因。

Sheets of postage stamps are perforated.

一张张的邮票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全是导致下肢静脉曲张术后复发的主要原因。

Sheets of postage stamps are perforated.

一邮票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全是导致下肢静脉曲术后主要原因。

Sheets of postage stamps are perforated.

一张张的邮票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不致下肢静脉曲张术后复发的主要原因。

Sheets of postage stamps are perforated.

一票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全是导致下肢静脉曲术后复发主要原因。

Sheets of postage stamps are perforated.

张张的邮票都打过接缝孔。

The insufficiency of perforating veins is the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.

交通静脉功能不全是导致下肢静脉曲张术后复发的主要原因。