Caring little about the so-called "youth culture" and the media, they have been shifting from psychology into medicine, from sociology into accounting and from black studies into computer programming.

In consideration of the effect of liquid dynamic pressure on the tubing string vertical vibration, the differential equation and frequency equation for describing the vibration are set up.

考虑液动压力对油管柱纵向振动的影响，建立了油管柱纵向振动微分方程，并给出了这种情况下油管柱纵向振动的频率方程。

Steering knuckle tie rod end pressure lubricator Grayioc tubing joint

转向节横拉杆接头油嘴

The article discusses the cause of deformation in the hydraulic test of pressure tubing and suggests some solutions on the basis of analysis.

阐述了耐压管水压试验变形的根本原因，在分析的基础上，指出了解决问题的方法。

Deformation Study on Hydraulic Test of Pressure Tubing

耐压管水压试验变形研究

This paper adopts the fourth theory of strength to decide the maximum depth of tubing pump. A better effectiveness is attained through applying the method in Wenliu Oilfield.

文章采用第四强度理论来确定最大下泵深度，并在文留油田的应用中取得了较好的效果。

This paper introduces the criterion of selecting pump, detonation mode, principle and action of inner blind hole perforator and tubing pump joint technology.

介绍了内盲孔射孔器与管式泵联作技术的选泵标准、起爆方式、原理和流程以及内盲孔射孔器的研制。

We introduce a new kind of ring-piston tubing pump, its structure and working principle.

文章介绍了一种活塞环型管式泵，对其提高泵效的工作原理、技术性能以及应用情况进行了阐述。

Development and Field Experiment of Tubing Pump Fixed-valve Preventive Plug

管式泵固定凡尔防堵塞器研制及其在矿场的应用

On working Tubing Pump and Its Application to Fertilization of Liquid Fertilizers

挤压泵工作原理及其在施液肥机上的应用

Research and application of technology combined inner blind hole perforator and tubing pump

内盲孔射孔器与管式泵联作技术的研究与应用

A kind of calculating method and its application on the maximum depth of tubing pump

管式泵最大下入深度的计算方法及应用

Piezometric technique with capillary tubing is a kind of technique which transfers downhole pressure onto surface by taking nitrogen as the pressure transfer medium, tests the pressure, and then based on it reckons the pressure at the piezometric depth.

毛细管测压技术是以氮气作压力传递介质，将井下压力传递到地面，在地面完成压力的测试，再将所测压力推算至井下测压深度处压力的一种测压技术。

Because of these characteristics, the pressure measurement system with capillary tubing can be used without depth limit and can measure the downhole pressure continuously without time limit.

由于这些特点，毛细管测压系统在使用时无深度限制，可以不受时间限制连续地测取井下压力。

Field application of system of temperature measuring with optic fiber and pressure measuring with capillary tubing

光纤测温、毛细钢管测压系统在现场中的应用

Piezometric technique with capillary tubing and its application

毛细管测压技术及应用

Introduction of pressure measurement system with capillary tubing

毛细管测压系统简介

Comparison on two ways of open-air drying of corrugated tubing of breathing machine

两种呼吸机螺纹管晾干法的比较

It is composed of casing flange, casing cross joint, wellhead valves, tubing hanger, tubing head cross joint and accessories.

这种井口装置由套管法兰、套管大四通、井口阀、油管挂、油管挂体及相关附件组成。

The leads from the model are most easily made of plastic tubing, which has little tendency to kink or leak and has good bending qualities.

做为从模型引出的导管以塑料管为最方便，用塑料管不会纠结和漏气而且弯曲性能好。

The cause analysis and solutions of early destroy of ABS plastic tubing internal stress

ABS塑胶管内应力早期破坏的原因分析及对策