straight internal thread
常见例句
- The internal thread comes within the broad definition of an internal undercut in that the thread forms a restriction which prevents the straight draw removal of the molding from the core.
因爲內螺紋搆成約束它阻礙零件從型芯的直接脫模所以內螺紋在內凹孔的廣義範圍內。
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