题目内容

The actual input flow of the hydraulic motor is greater than the theoretical flow ( )

A. 对
B. 错

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Single-rod cylinder can realize two directions of movement by hydraulic oil ()

A. 对
B. 错

The filter installed at the suction port of the hydraulic pump usually has higher filtration accuracy than the filter installed at the pressure oil port ( ).

A. 对
B. 错

The pilot-operated check valve can flow forward but can not flow reversely ( ).

A. 对
B. 错

In the volumetric speed control circuit, the pressure relief valve in the main oil circuit plays a safety protection role ( )

A. 对
B. 错

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