问题描述：
[单选]
Lube oil pumps taking suction from the sump of most small marine engines are usually（）．
A．of the diaphragm type
B．of the centrifugal type
C．of the positive displacement type
D．independently driven by electric motor
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：A large， low-speed， main propulsion diesel engine uses sea water to directly cool the（）．
下一篇：Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the（）．
- 我要回答: 网友(216.73.216.96)
- 热门题目: 1.大型低速柴油机铸铁气缸套的异 2.大型低速柴油机铸铁气缸套的正 3.由于（）等操作管理不当引起气