... system supplies strong power.3.2 Double motor high-low speed power head ensures efficient drilling-in. ... TRANSMISSION EQUIPMENT COMPANY equipped with ITALY BREVINI double speed reductor and with GERMANY REXROTH variable hydraulic motor ... flat-top, multi-speed, stepless-speed), Construction Elevators(multi-speed, stepless-speed), Concrete Mixers (rotary-drum-type, double-horizontal-shaft), Concrete ...