单项选择题

The （） of the main shaft should be measured with a （）.

A.clearance；calipers
B.sinking；bridge gauge
C.diameter；bridge gauge
D.clearance；lead wire

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单项选择题

A.to stiffen
B.to soften
C.to loosen
D.to wear

单项选择题

A.prepare to stop the engine
B.assemble an engine on its bedplate
C.make an engine ready for starting
D.make an engine run steadily

单项选择题

A.through bolts
B.turbo-chargers
C.bed plates
D.columns