... hand tap for pipe thread 手用管牙丝锥 internal thread pipe 内螺纹管 iron pipe thread standard 铁管丝口标准 ...
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parallel internal pipe thread 圆柱内管螺纹
internal pipe thread 管子内螺纹
taper internal pipe thread 圆锥内管螺纹
nptf internal pipe thread 美国标准锥管螺纹管内螺纹
Dryseal straight pipe internal thread 干密封燃油直管螺纹
According to connection method classification (1) threaded connection valves: valve with internal thread or external thread, and pipe thread connection.
按连接方法分类(1)螺纹连接阀门：阀体带有内螺纹或外螺纹，与管道螺纹连接。
Both have the same pitch diameter at the top of the hole of internal threads or end of the pipe on external threads, and both have the same thread lengths or depths.
在内螺纹的孔的顶端或者外螺纹的管的端部拥有相同的中径，而且拥有相同的螺纹长度和深度。
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