作用反作用原理
principle of action and reaction
负荷柱塞弹簧腔
load piston spring cavity
斜盘伺服柱塞弹簧
swashplate control servo piston spring
弹簧作用停放制动器
spring applied parking brake
外弹簧作用力
Outer spring function force
中子-质子相互作用作用
neutron proton interaction
60Si2CrVA圆柱弹簧
60Si2CrVA cylindrical spring