single-plane gear同: "抓"平面: plane; two dimensions; flat ...减速器: decelerator; reducer; reduct ...同平面: coplanar全同平面: identical plane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:同平面减速器，即可在微信中查询翻译
