gearing-up增速传动: step-up drive增加: increase; raise; add增速传动: gearing up; gearing-up; step-up drive增速传动增速传动装置: gearing-up; gearingupp增速传动装置: gearing-up; increase gear; multiplying gear; overdrive system; step-ugear下载手机词典可随时随地查词查翻译