The variation in area causes an adjusted rate of fluid to pass from the lower chamber, through the orifice to the upper chamber. The above sentence means "空间区域的变化引起不同的流量率的液压油从上部腔，通过限流孔，进人下部腔．"
A.1正确答案B
The variation in area causes an adjusted rate of fluid to pass from the lower chamber, through the orifice to the upper chamber. The above sentence means "空间区域的变化引起不同的流量率的液压油从上部腔，通过限流孔，进人下部腔．"
A.1正确答案B
