查询词典 perforation

Use it as a digital perforation gauge.

用它作为数字穿孔衡量。

Any of the chiefly marine protozoans of the order Foraminifera,characteristically having a calcareous shell with perforation s through which numerous pseudopods protrude.

有孔虫一种有孔虫目的大多为海洋的原生动物，以具有带孔的钙质壳为特征，通过该孔有许多虚足突出

Considering effects of perforation resistibility,light weight and stregth,a plate girder structure should be a rather excellent form.

随着各国对反舰导弹的攻击性能的加强和完善，船体外板的防护能力首当其冲地受到挑战。

After particle distribution analysis and test of penetration of oil perforation to steel target,the influence of particles arrangement and distribution of powder shaped charge liner on performance of jet was studied and the liner was treated by thermal treatment.

利用筛分法，将127型石油射孔弹药型罩中的铜粉进行颗粒分级，并与其他金属粉进行粒度级配，通过粒度分布分析及射孔弹侵彻钢靶试验，研究了粉末药型罩中金属颗粒的粒度级配及分布对聚能射流性能的影响，同时对药型罩进行了热处理研究。

Combined Perforating Technology has a very good effect since the high-pressure gas produced by the propellant charge impacts on the perforation channels, but its low charge and gas contribute to some disadvantages, and should use the perforating guns with the pressure-relieving hole.

一体式复合射孔技术火药装药与射孔段在同一层位，火药产生的高压气体正对射孔孔道做功，效率商，作业效果好；缺点是装药量少，产气量较低，需使用带泄压孔的特制射孔枪，有时发生炸枪事故。

Methods From June 2004 to December 2006, 112 patients （230 vital teeth） who were performed root canal therapy for oral restoration, accidental perforation of pulp chamber and endodontitis were selected.

2004年6月至2006年12月，以因口腔修复需要、意外穿髓或牙髓炎发作而需行根管治疗的112例患者（230颗活髓牙）作为研究对象。

Thefeatures of floral and leaf morphogenesis , the variation of perforation plate of vessels ,the contact types between vessels and xylem parenchyma cells , the organic anatomy ofC .

本文从连香树花和叶的形态发生与发育，导管分子穿孔板韵变异，导管分子间以及导管分子与木质部薄壁组织细胞的接触方式，器官的解剖结构等方面进行了研究。

At present there are very sophisticated equipment wire walking Cutting Machine 2-1 high-speed perforation Taiwan.

目前设备有非常精密的慢走丝线切割机2台高速穿孔机1台。

As an offshore wildcat well in Shengli Oilfield for eliminating formation contamination and demonstrating reserves, the composite perforation and open hole completion was ultilized in Chengbei 302 Well.

埕北302井是胜利油田布置的一口海上预探井，为减少油层污染、探明油藏储量，该井采用了射孔完井和裸眼完井的复合完井方式。

The new type four-channel downhole test gauge is a special multi-parameter instrument which is used to test the whole process of perforation and crack, by which variational curve of pressure, acceleration, temperature and the voltage of batteries can be measured and collected simultaneously.

新一代石油井下测试仪是用来测试整个射孔和压裂过程数据的多参数专用仪器，可同时记录压力、加速度、温度和电池电压的变化曲线。

We got alerted a couple of times while we were down south that HETs were on the way to bring us back up north because things were going to go hot again, but it was just rumors.

南下的途中我们不只一次得到警告说重型装备运输车将拉着我们重新北上，因为局势正在变得重新紧张起来，但这只是谣传。

It's the one where they find the ghost in the salt mine.

这一集是演他们在盐矿找到鬼