【机械工程】液体齿轮电动机（液压传动装置马达）

planetary gear, differential gear, belt drive

oval gear flowmeter【仪】;oval wheel flowmeter【仪】

put into high gear; go full steam ahead

two-stage harmonic gear drive【机】

detaching mechanism【机】;disengaging gear【机】;release mechanism【机】

big gear wheel

planet gear

high efficiency gear hobbing machine