液压控制系统

hydraulic copying head【机】;hydro-tracer head【机】

hydraulic machinery

inadjustable hydraulic coupling【油气】

hydraulic torque converter lockout【机】;hydraulic torque converter lockup【机】

hydraulic rope-geared elevator【机】

mechanical screwdriver, air wrench, electric or hydraulic screwdriver,

hydraulic tensioning equipment【机】

hydraulic platform