perforation

现在分词：

动词现在分词: perforating

更多词形：

形容词: perforable | 名词: perfora-tor | 动词过去式: perforated | 动词过去分词: perforated | 动词现在分词: perforating | 动词第三人称单数: perforates |

单词例句：

The experimental results indicate that the ultimate load decreases with increase of perforation size.

根据不同开孔尺寸试件的试验结果可知，开孔构件的极限承载力随着开孔高度、宽度的增大而下降。

Sleeves can also serve as an original-packing guarantee in conjunction with a perforation feature.

套标经打孔装置打上孔后,亦可作为正品包装的标志。

And wellbore instability also influences the perforation and sand production,ect in the reservoir development.

井壁失稳还影响固井，油藏开发中的射孔、防砂、采油和油井增产等后序作业的实施。

Involvement of the small bowel by primary or metastic neoplasms may occasionally be followed by perforation.

原发性或转移性肿瘤累及小肠也偶可继发穿孔。

Objective: To study the diagnosis and surgical treatment of esophageal perforation.

摘要目的：探讨食管穿孔的诊断与外科治疗方法。

A small hole or perforation,usually rimmed with metal,cord,fabric,or leather,used for fastening with a cord or hook.

孔眼一小洞或眼儿，常用金属、线、纤维或皮做边，用于系绳索或钩子

Any tape punch that automatically converts coded electrical signals into perforation in tape.

自动地将编码电信号变换为纸带上的穿孔的任何纸带穿孔机。

Operation is effective for temporomandibular joint disc perforation.

手术治疗对于颞下颌关节盘穿孔具有显著疗效。

The reason is that the edge of a burn perforation has decreased blood supply.

主要是因穿孔边缘有厉害的缺血所致。