液壓升降平臺http://www.supervolcan.com/防跌落裝置還包括單向節流閥，右腔與單向節流閥的一端相連接，單向節流閥的另一端與儲液壓缸相連接，液壓油自右腔流向儲液壓缸時單向節流閥關閉，液壓油自儲液壓缸流向右腔時單向節流閥打開。
Hydraulic elevator goods ladder anti dropping device also comprises a one-way throttle valve, right cavity and a one-way throttle valve is connected to one end, one-way throttle valve and the other end of reservoir hydraulic cylinder is connected, hydraulic oil since the right cavity flow to the storage of hydraulic cylinder when the one-way throttle valve is closed, hydraulic oil from reservoir hydraulic cylinder flows into the right cavity when the one-way throttle valve is opened. 

液壓升降平臺上升時，液壓油既可經電磁閥流向右腔，也可經單向節流閥流向右腔，減小阻力，從而減小升降機上升時的功耗。
When the hydraulic lifting goods ladder is increased, the hydraulic oil can flow through the electromagnetic valve to the right cavity, and the hydraulic oil can flow to the right cavity through a one-way throttle valve to reduce the

resistance, thereby reducing the power consumption of the elevator. 

液壓升降平臺http://www.supervolcan.com/下降時，液壓油不能經過單向節流閥，只能經過電磁閥，液壓升降機突然失電時防跌落裝置才能有效制動升降機下降。
Hydraulic lift cargo ladder down, the hydraulic oil can not be a one-way throttle valve, can only pass through the solenoid valve, hydraulic lift suddenly lost power when the anti fall device can effectively brake lift down.