单项选择题
The crankshaft deflection is at first to be （） before and after repair.
A.disassembled
B.renewed
C.measured
D.regulated
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相关考题
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单项选择题
The crank-room cover should not be opened until at least （） minutes after the engine stops.
A.one
B.fifteen
C.sixty
D.ninety -
单项选择题
The crank-room cover should not be opened until at least （） minutes after the engine stops.
A.10
B.15
C.20
D.30 -
单项选择题
The crankcase cover should never be allowed to open for investigation when （）
A.the engine stops
B.the engine is running
C.you repair the engine
D.overhauling the engine
