无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

單項(xiàng)選擇題

A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the ().

A.pilot valve opening
B.compensating needle valve
C.compensating spring tension
D.accumulator spring tension

微信掃碼免費(fèi)搜題