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.
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.
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