fixed retainerfixed retaining appliance固定: fixed; regular保持: keep; hold; retain; maintain ...器: implement; utensil; ware保持器: hold unit; keepers; maintainer; retainer保留器，保持器: retainer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:固定保持器，即可在微信中查询翻译
