分析了国内外仪表阀门及管件产品的现状，介绍了国外几种常用的仪表阀门及管件的结构，指出了国内此类产品存在的差距。
This paper compares instrumentation valves and tube fittings with domestic and abroad and introduce the structure of instrumentation valves and tube fittings in common use at abroad.
CPVC管道系统包括管道、管件、阀门及板材。
CPVC piping system is available with the whole system of pipes, fittings, valves and sheets.
所有液压系统均为有油泵，控制阀门，软管，油缸及管件的整个系统。
All hydraulic arrangements will be supplied complete with pump, control-valves, hoses, cylinders and fittings.
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