retrievable plug可: approve收回: take back; call in; recover; ...堵塞: stop up器: implement; utensil; ware堵塞器: blanking plug; packer; stopper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:可收回堵塞器，即可在微信中查询翻译
