烧结用的铁矿石有哪几种？其烧结特性如何？

A. 科幻
B. 悬疑
C. 推理

A. drain water from the air receiver
B. drain water from the cylinders
C. delay the compression process until the motor is up to speed
D. check pump alignment

A. 正确
B. 错误

A. 撕裂
B. 跑偏
C. 断带
D. 打滑