A.液體高壓運(yùn)動 B.電腐蝕 C.切削 D.化學(xué)反應(yīng)
A.0.2~0.5 B.0.5~0.9 C.0.8~1.1 D.1.1~1.5
A.接觸 B.非接觸 C.極限 D.直接