... value adopts the advanced S pipe value system,with good sealing performance,simple and reliable structure,and ... 5)Hydraulic system is designed as open-type,with features of reliable working,stable switching,high efficiency ... of electrical system,and PLC for control system,with reliable working,strong adaptability,and wired remote control ... line:Trademanager: cn201489001 HBT60.13.90S trailer concrete pump