题目内容

A bentaxispistonpumphas

A. abentpumpaxis
B. abentcylinderaxis
C. abentdriveshaft
D. cylinderblockinclinedtothedriveshaft

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Abentaxispistonpumphas

A. cylinderblockinclinedtothedriveshaft
B. abentpumpaxis
C. alloftheabove
D. noneoftheabove

Whatistheadvantageofpistonpumps?

A. smoothandquietoperation
B. highoutputpressure
C. lowcostofproduction
D. alloftheabove

Pistonpumpscanbedesignedasvariabledisplacementpumps.

A. 对
B. 错

Pistonpumpsarefixeddisplacementpumps.

A. 对
B. 错