1.
brass running nipple
下抽油杆时所用黄铜护罩
2.
An Application of Two-way Protection Rod Collars to Highly-deviated Wells in Beach Oilfields
双向保护抽油杆接箍在滩海油田大斜度井中的应用
3.
Development and Application of PCP Special Pumping Rod with Middle Displacement;
中排量螺杆泵专用抽油杆研制与应用
4.
DYNAMIC ANALYSIS OF THE SUCKER ROD IN THE POLYMER FLOODING METHOD
用于聚合物驱油的抽油杆动力学分析
5.
The structure of closed valve bonnet influences the perfor-mance of sucker rod pumps.
闭式阀罩是影响抽油泵使用性能的零件。
6.
Ultrasonic Nondestructive Characterization of Steel for D Grade Sucker Rod;
D级抽油杆用钢的超声无损表征初探
7.
Research and Application of Prevention of Sucker Rod String from Deviated Friction in Deviating Wells
斜井防偏磨抽油杆柱工艺研究与应用
8.
Selection and application of side wearing resistant tools for rods and pipes of rod pumped wells
抽油机井杆、管防偏磨工具优选与应用
9.
Stress Analysis of Sucker Rod and Application of Heavy-weight Rod in Directional Well
定向井抽油杆柱应力分析及加重杆的应用
10.
What bronze uses is not brass,but red copper and the alloy of plumbum and stannic.
青铜所用的不是黄铜，是红铜和铅、锡的合金。
11.
This is the way all damage shields work.
这是所有伤害性防护罩的作用方式。
12.
A medieval shield large enough to protect the whole body.
大盾，护身罩中世纪时足以用来保护整个身体的护罩
13.
The shield is lifted by pneumatic rod.If the shield is opened,the general power supply of the machine is cut off and the alarm lamp and the operation indicator inside the shield light on to provide sufficient lighting at night.
护罩用气动撑杆撑起，打开时全机总电源断开警灯和护罩内的工作灯亮起，保持夜间工作光线充足。
14.
brass-plated iron square hinge
镀黄铜抽心铁方铰链
15.
a mask that you wear for protection when doing welding.
焊接时戴着起保护作用的面罩。
16.
To make of or decorate with brass.
用黄铜制或用黄铜装饰
17.
The Research of the Down-hole Work Condition Diagnosis Technique on the Rod Pumping System;
有杆抽油系统井下工况诊断技术的研究
18.
Lube lines are extended through shaft guards for easy accessibility.
润滑油填加点延伸到轴防护罩外，容易使用。