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單項(xiàng)選擇題

Pumps and fine filters are arranged （） with one as standby.

A.in duplicate
B.in double
C.at twice
D.for two

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單項(xiàng)選擇題

Please draw out a 0l mm shim between the two halves of the bearing （） the clearance.

A.to reduce
B.to increase
C.and reduce
D.and increase

單項(xiàng)選擇題

Please draw out a 01 mm （） between the two halves of the bearing to reduce the clearance.

A.shim
B.gasket
C.washer
D.packing

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