perforating

Sheets of postage stamps are perforated.

一张张邮票都打过接缝。

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主要原。

Objective To investigate the changes of blood-ocular barrier and effect of ligustrazine on the ocular endosmosis of intravenous ciprofloxacin in rabbit eyes of corneal perforating injury.

研究兔角膜穿伤后血-眼屏障及川芎嗪对环丙沙星在兔眼角膜穿伤眼内渗透性影响。