Because the unloading time of verticalscrew shipunloader is short, it will have less impact from tide and lower cost of shipping.
由于垂直螺旋卸船机的卸船时间短，所以受潮汐的影响少， 航期费少，有利于船舶运费的降低。
3
When the vertical turret decline, due to friction hinder its decline, the screw on helical screw nut under the physiognomy contact screw nut in the space below.