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改良锥螺纹的连接形式 ,使其接头强度大于等于母材强度 ,使其破坏时断头断在母材上 ,提高接头强度。
Improve the connection of the tapered thread so that the joint strength is greater than or equal to the strength of the parent material. When it breaks, break the head and break it on the parent material to increase the strength of the joint.