... 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
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