Dai: the internal thread of the true artist is an unbroken one.
戴卓群：真正的艺术家内在的线索一定是一致的。
Connection mode: internal thread connection;
连接方式：内螺纹连接；
Cold form tapping process is an effective method to enhance fatigue strength of internal thread.
内螺纹冷挤压成形是提高内螺纹疲劳强度的有效方法。
Cold form tapping process is an effective method to enhance fatigue strength of internal thread.
内螺纹冷挤压成形是提高内螺纹疲劳强度的有效方法。
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