three-speed gear三: three速: fast; rapid; quick; speedy链轮: chain gear; chain wheel; spr ...三速: triple-speed链轮: [工业] chain gear; chain wheel; sprocket; sprocket gear; sprocket gear wheel; sprocket wheel; star pinion下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:三速链轮，即可在微信中查询翻译
