单项选择题
A.the column B.the jacket C.cylinder cover D.cylinder liner
Bearing knocks are likely to occur from （）.A.less clear...
单项选择题Bearing knocks are likely to occur from （）.
A.less clearance B.dirty lube oil C.overload D.bearing wear
Be sure to make the engine turn by （） before starting a...
单项选择题Be sure to make the engine turn by （） before starting and after stopping .
A.steering gear B.turning gear C.steering wheel D.turning cycle
At the top of the A-frames there is a strong cast iron ...
单项选择题At the top of the A-frames there is a strong cast iron frame called （）.
A.cylinder liner B.cylinder cover C.the gear box D.the scavenging box
