单项选择题
A.热切B.冷切C.变形D.裂纹
A.24mm,22mmB.24mm,23mmC.24mm,24mmD.22mm,23mm
A.30mm,20mmB.30mm,15mmC.25mm,10mmD.30mm,10mm
A.转8AB.转K4C.转K2D.转K5
微信扫一扫,加关注免费搜题