单项选择题
A.宽13mm,齿距1.8mmB.宽12mm,齿距0.8mmC.宽12mm,齿距1.4mmD.厚0.64mm,齿距1.8mm
A.电熔对接焊机B.电动套丝机C.手动铰板D.割管器
A.鲤鱼钳B.钢丝钳C.水泵钳D.尖嘴钳