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H70造句

造句3.4W

In this paper, the mechanism of electrochemistry corrosion of the tractor radiator brazed with brass (H90 and H70) and Sn-Pb filler metal was investigated.

H70造句

研究了采用黄铜(H90、H70)和锡铅钎料钎焊而成的拖拉机水箱电化学腐蚀机理。

标签:H70 造句