查询词典 screw thread

When connecting rubber joint and pipe flange,the bolt pole shall extend to the pipe flange so as to prevent from crushing or pricking the coved screw thread expanding because of pressure, all bolts shall be pressured and screwed down and word congruously, If the surrounding circumstance is bad,spring washer and flat gasket shall be added to prevent bolts from loosing .

4，若使用拱形或高弧度橡胶接头时，（因螺栓六角难以穿过法兰孔），必须采用双头螺栓，并尽量减少球体端螺纹突出部分，以免球体受压膨胀时被挤伤，使橡胶接头早期损坏。

As such, magnetic particle inspection for the screw thread of the drill collar is very necessary and important.

因而钻铤内外螺纹的磁粉检测十分必要和重要。

This paper systematically introduces the basic principle and advantages of magnetic particle inspection, the stress analysis of the oil drill collar and the magnetic particle inspection for the screw thread of the oil drill collar.

本文系统介绍磁粉检测基本原理及优点，石油钻铤的受力分析，石油钻铤螺纹的磁粉检测。

According to the standards of the petroleum industry in China and the technical criteria and operation code designed by the JB/T4730.4-2005 for oil drill collar magnetic particle inspection, and upon conducting experimental inspections on oil drill collars according to this criteria and through the comparisons of ultrasonic testing results and theoretical analysis, it is found that this technical criteria is able to detect the defects of the screw thread effectively.

根据中国石油行业标准和JB/T4730.4-2005对石油钻铤设计了石油钻铤磁粉检测的工艺规范和工艺卡，并按此规范对石油钻铤进行实验探伤，通过对比超声检测的检测结果及理论分析，此工艺规范可有效的检测出钻铤螺纹部位的缺陷。

This instrument can inspect all kinds of surface and outline of complicated work-Pieces, cam, screw thread, gear, perform milling cutter and so on.

该仪器可以检查面和复杂的工件，凸轮，螺纹，齿轮，各种演出大纲铣刀等。

This kind of pipe features: lower density;sound-proof, when used as drain-pipe, water flow against the screw-thread inwall downwards, which solves the problem of noise.

这种管道的特点：密度较低；健全溜走，当用作排水管、水流对螺纹内壁调低它解决了噪声。

It is identified that PVC expanded pipe with screw-thread inwall can lower the noise for 5 to 7 Db than PVC expanded pipe, and 10 -15 Db than solid wall PVC pipe, and it is the most idea drain pipe fro building up to now.

据鉴定，扩大聚氯乙烯管螺纹内壁可降低噪声5至7分贝，比聚氯乙烯扩管 10-15分贝，比固墙PVC管、而且也是最排水管穿梭建设构想到现在。

Objective To investigate the effects of different shape of implant screw thread on stress distribution in implant-bone interface.

目的研究种植体表面不同螺纹形状对种植体-骨界面应力分布的影响，以供临床筛选合适的种植系统。

Therefore, in order to enable the screw to smoke, Pai oil separated from the mouth, the screw thread section of the length of at least larger than a lead.

因此，为了使螺杆能吸、排油口分隔开来，螺杆的螺纹段的长度至少要大于一个导程。从上述工作原理可以看出，螺杆泵有以下优点

Therefore, in order to enable the screw to smoke, Pai oil separated from the mouth, screw thread length is greater than at least one lead.

因而，替了使螺杆能呼、排油口合隔启往，螺杆的螺纹段的少度至多要小于一个导程。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。