單項選擇題

The position of the piston parts in relation to each other is secured by means of （） in the crown.

A.a mark
B.a bolt
C.a dowel pin
D.a measuring tool

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單項選擇題

The position of the interface between oil and water within the centrifuge is achieved by the use of （）.

A.gravity disc
B.centrifugal bowl
C.a stack of discs
D.main sealing ring

單項選擇題

The position of （） on the crosshead on a large diesel engine is determined by dowel pins.

A.the guideway
B.the piston rod
C.the crosshead shoes
D.the interlocked circlip

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