A.必是間歇運(yùn)動(dòng)B.金屬不斷投入切削的運(yùn)動(dòng)C.消耗功率多D.受力大
A.5%~50% B.3.33%~10% C.7.33%~20% D.15%~40%
A.互換 B.選配 C.修配 D.調(diào)整