独立自主就是依靠自己的力量发展革命和建设事业,任何大国主义的思想行为都是完全错误的。
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Acylinderhasaboreareaof300cm2,andthepistonmovesat180cm/min.Theflowrateintothepumpis
A. 16.7 L/min
B. 54L/min
C. 60 L/min
D. noneoftheabove
Whichdimensiondecidesoutputforceofahydrauliccylinder?
A. cylinderlength
B. pistonroddiameter
C. strokelength
D. pistondiameter
Whichdimensiondecidesoutputforceofahydrauliccylinder?
A. cylinderinnerdiameter
B. cylinderouterdiameter
C. cylinderlength
D. noneoftheabove
Whichfactorshouldbeconsideredwhenselectingpistonroddiameterforhydrauliccylinder?
A. pistondiameter
B. strokelength
C. outputforce
D. alloftheabove
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