单项选择题
Among the basic categories of equipment, which of the following is used to convert hydraulic energy into continuous rotary motion?（）
A.Hydraulic pumps
B.Valve
C.Hydraulic cylinders
D.Hydraulic motors
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相关考题
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单项选择题
Among the basic categories of equipment, which of the following are used to convert mechanical into hydraulic energy?（）
A.The hydraulic pumps
B.Valves
C.Hydraulic cylinders
D.Hydraulic motors -
单项选择题
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A.cast
B.put
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