H70的精选

Inthispaper,themechanismofelectrochemistrycorrosionofthetractorradiatorbrazedwithbrass(H90andH70)andSn-Pbfillermetalwasinvestigated.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...