Tapered threads have been extensively used on pipeline connection, and the quality of thread is a key to ensure satisfactory coupling.
逐渐变小线已经普遍地在渠道衔接上被用，而且线的质量是一支确定满意的结合关键。
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Not just an added reinforcing ring, this unique pre-compression design compensates for expansion forces generated from normal tapered pipe thread joint make-up.