... operating system.Engine,hydraulic pump, hydraulic motor, hydraulic valve, reductor,chassis part,electronic control device,and other ... the machines all hydraulic pump,hydraulic motor,hydraulic valve). 3Chassis partsfrom ITALY BERCO S.P.A.(including ... bearingXUZHOU ROTHE ERDE SLEWING BEARING CO.,LTD. 9Hydraulic oil cylinderSICHUAN CHANGJIANG HYDRAULIC PART CO.,LTD. 10Drilling rod--513 frictional drilling ...