Kao Sung-nien's fat but firm face was like an unleavened millet-flour steamed bread. "Voracious time" (Edax vetustas) could not make a dent on it. There was not a single tooth mark or crease .
高校长肥而结实的脸像没发酵的黄面粉馒头，“馋嘴的时间”咬也咬不动他，一条牙齿印或皱纹都没有。
The tooth shape, fit and mark of clamping connection and pipe connection inch threads commonly used are introduced and their seal features.
介绍了常见的用于紧固联接英寸制螺纹和用于管道连接英寸制螺纹的牙形、配合和标识，以及管螺纹的密封特点。
According as formula of cutting surface mark deepness from educing, the paper explain that is really one another contradiction between tooth feed rate and cutting surface roughness.
文章首先以导出的锯痕深度公式为依据，说明每齿进给量与锯切表面光洁度两者之间确实是相互矛盾的。
According as formula of cutting surface mark deepness from educing, the paper explain that is really one another contradiction between tooth feed rate and cutting surface roughness.
文章首先以导出的锯痕深度公式为依据，说明每齿进给量与锯切表面光洁度两者之间确实是相互矛盾的。
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