roller cell滚圆: round as a ball槽: trough; manger滚圆: (极圆) round as a ball圆槽: chamfer; circular groove; circular slot滚圆的: well rounded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:滚圆槽，即可在微信中查询翻译
