Whatcausesspeedreductionincylindercushioning?
A. oilflowthroughasmallhole
B. backpressurecreatedinthesystem
C. bothA.andB.
D. noneoftheabove
Whyarehydrauliccylinderscushioned?
A. cushioningdeceleratesthepistonofacylinder
B. stressandvibrationscanbereduced
C. bothA.andB.
D. noneoftheabove
Cylinderendcushioningdecreasespistonspeedbytheendofthepistonmotion.
A. 对
B. 错
Cylinderendcushioning does not prevent piston motion atthebeginningof a stroke.
A. 对
B. 错