... with parallelogram amplitude varying device makes boring tool position rapidly and accurately.3.8 Drilling ... including reductor and drum and equipped with imported REXROTH variable hydraulic motor).6,Walking reductor—from GERMANY REXROTH ... -head, flat-top, multi-speed, stepless-speed), Construction Elevators(multi-speed, stepless-speed), Concrete Mixers (rotary-drum-type, double-horizontal-shaft ...