step-up gearing〔名词〕变速齿轮详细»
变速齿轮change gear;change speed gear;change wheel;changeful gear;speed change gear详细»
变速齿轮change gear;changeful gear;changefulgear;stud gear;variable speed drive gear详细»
变速齿轮speed gear transmission gear详细»
变速齿轮changeful gear;changefulgear详细»
变速齿轮change gear wheet;change spur gear;speed change gear;speed gear详细»
变速齿轮change gear;change-speed gear;changefulgear;changewheel;fast motion gear;gear change;pick off gear;speed change gear详细»
变速齿轮change-speed gear (variable gear,variable-speed gear)详细»