中文谷H70造句怎么写
- 造句
- 关注：3.22W次
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。
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.
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