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單項(xiàng)選擇題

A.volute pump
B.centrifugal pump
C.diaphragm pump
D.gear pump

你可能感興趣的試題

A.fuel oil pressure
B.a cam operated follower
C.a spring-loaded pressure plate
D.timing gears keyed to the crankshaft

A.six consecutive starts
B.eight consecutive starts
C.ten consecutive starts
D.twelve consecutive starts

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