Before starting the turning gear, _____ should be worked by hand to minimize corrosive action on the liners.
举一反三
- After the engine is warmed, we should ()the turning gear before<br/>starting the engine. A: take in B: put in C: take out D: put out
- Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.
- Before starting an engine by air, the engine must（） A: be turned by a turning gear for at least one minute B: be turned by a turning gear for at least two minutes C: be turned at least one complete turn D: be turned at least two complete tur
- It is abnormal that when the engine is being turned by the turning gear or by hand， （）.
- Before starting the engine the air bottle should be （）.