ball (roller)complement球: sphere; globe滚子: running pulley总体: ensemble; totality; massing; ...球(滚子)组: ball (roller)set滚子总体内径: roller complemert bore diameter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:球(滚子)总体,即可在微信中查询翻译