所有锥管螺纹预涂聚四氟乙烯防漏胶，密封性能好。
All awl tube thread pre-coated PTEF leakproof gum, with excellent sealing property.
本文介绍了锥管螺纹丝锥在万工显示上的测量原理、计算公式及测量方法。
This paper introduces the measuring principle, calculating formula and measuring method of the taps for taper pipe threads through the universal tool microscope.
这个标准涵盖塑料美国锥管螺纹(NPT)的尺寸和计量方法，用于泄漏密封连接，现在已在所有有关塑料管道产品的ASTM标准中引用。
The standard covers dimensions and gaging of plastic tapered National Pipe Threads (NPT) for leak-tight joints, and it is now referenced in all ASTM Standards for plastic piping products.
这个标准涵盖塑料美国锥管螺纹(NPT)的尺寸和计量方法，用于泄漏密封连接，现在已在所有有关塑料管道产品的ASTM标准中引用。
The standard covers dimensions and gaging of plastic tapered National Pipe Threads (NPT) for leak-tight joints, and it is now referenced in all ASTM Standards for plastic piping products.
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