XJ450修井机绞车总成主要由()、绞车架及护罩、链条及护罩、角传动箱部分组成。
A、滚筒系统
B、滚筒和转盘
C、主滚筒和大钩
D、主滚筒及刹车系统
参考答案:D
The manager was rushing to the airport so he______the report the secretary had typed.
A.got through
B.glanced through
C.saw through
D.carried through
我公司磨煤机分离器出口温度正常为()℃;该温度通过自动调节()的开度来控制。