问题描述：
[单选]
On a medium-speed main propulsion diesel engine， the crank-pin or crank journal bearings receive lubricating oil from（）．
A．a spindle lubricator
B．an oil jet
C．internal splashing
D．drilled passages in the crankshaft
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：Fins are installed on the generating tube surfaces in waste heat boilers to（）．
下一篇：The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is（）
- 我要回答: 网友(216.73.216.168)
- 热门题目: 1.主机底脚螺栓全部装好上紧后， 2.底脚螺栓中的紧配螺栓，其直径 3.如果采用（）时，底脚螺栓可以