double reduction bevel spur gear双: two; twin; both; dual级: level; rank; grade圆锥: circular cone圆柱: column齿轮: cogwheel; gear wheel wheel-l ...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:双级圆锥圆柱齿轮减速器,即可在微信中查询翻译