... two special systems avoid hydraulic impact on changing direction.2. Firstly adopted the technology that main ... ” oil pump and American-made “Vickers” hydraulic direction-changing valve, with high discharge, high efficiency, long ... volumem30.713Total masskg618014Concrete slumpmm80-23015Theory vertical pumping heightm23016Theory direction change timesLow/High pressuretimes/min25/1517Dimension: LXWXHmm6400 ...