用“H70”造句大全，H70造句

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.

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。