管道中的

SH guided wave dispersion characteristics and wave structure for free surface isotropic elastic pipe circumferential waveguide were calculated and analyzed to guide pipeline inspection,and these characteristics were compared with those of the plate SH guided wave.

为指导基于超声导波的管道无损检测，计算并分析水平切变（shear horizontal，SH）导波在具有自由内表面、外表面的弹性各向同性管道周向波导中传播的频散和波结构特性，将这些特性与平板SH导波的对应特性进行对比分析。

Discussing and studying the piping feeding distance that is from outgate of decompression orifice plate of IG541 mixture gas piping extinguishing system to the farthest nozzles, gave the range of piping feeding distance that is common in use IG541 mixture gas fire extinguishing system s in engineering design.

依据《气体灭火系统设计规范》，对IG541混合气体有管网灭火系统减压孔板出口到最远喷头的管道输送距离进行探讨，提出工程设计中IG541混合气体灭火系统常用的管道输送距离范围。

Because the pipe and soil are two kinds of different materials, the effect of interface is considered by establishing the pipe-soil contact pair prescribed in the program.

由于管道与土体是两种不同的材料，有必要考虑接触面的影响，根据软件中所规定的建立接触面的方法建立管道—海床这一接触对。

The technique for subsea pipeline dry maintenance is one of the methods for solving the problems.

海底管道在使用过程中，会由于各种原因而损坏，严重时需要更换损坏的管段，海底管道干式维修技术就是解决这一问题的方法之一。

It was one term momentous engineering, whereas shallow burring pipe heat preservation ensure water supply normal parameter clause against that at Qing zang railway frozen soil environment carry into execution pipe shallow cover up water supply.

在青藏铁路冻土环境中实施管道浅埋供水是一项重大的工程，而浅埋管道保温则是保证供水正常的首要条件。

All piping shall be hydrostatically tested to the minimum pressure specified on the line lists or by Code, but not less than 103 kPa except piping excluded or modified herein.

所有管道均应在管线表或规范规定的最低压力下进行液压试验，试验压力不得低于103 kPa，未包含在本技术条件中或经改造的管道除外。

This valve is widely used in the pipe system transporting coal gas, natural gas, venting and environment protection in building material, glass, mining, power, light industry and papermaking departments.

电动气体切断阀，适用于建材、玻璃、矿山、电力、轻工、造纸等行业的能源输送管道的煤气、天然气、通风、环保工程等管道系统中。

This valve is widely used in the pipe system transporting coal gas, natural gas, venting and environment protection in building material, glass, mining, power, light industry and papermaking departments. The technique is introduced from foreign Company.

手动翻板式三杆蝶阀引进国外先进技术，广泛适用于建材、玻璃、矿山、电力、轻工、造纸等行业的能源输送管道的煤气、天然气、通风、环保工程等管道系统中。

This valve is widely used in the pipe system transporting coal gas, natural gas, venting and environment protection in building material, glass, mining, power, light industry and papermaking departments. The technique is introduced from foreign Company.

电动翻板式三杆蝶阀引进国外先进技术，广泛适用于建材、玻璃、矿山、电力、轻工、造纸等行业的能源输送管道的煤气、天然气、通风、环保工程等管道系统中。

The underwater pipeline tapping machine meets working needs by introducing such design as using hydraulic system as power source, putting transmission box to the bottom of machine, setting safety clutch in feeding system, having fast translation function of the spindle, detecting the spindle translation with differential, using dial to display and seting feed depth.

水下管道开孔机以液压系统为动力，采用传动箱下置、进给系统中设置安全离合器、主轴带有快进和快退功能、差速器检测主轴的进给运动、刻度盘指示和设定开孔深度等设计方案，满足了水下管道开孔作业的要求。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。