cotm customer owned and telephone company maintained归: return; go back to客户: connection; custom; customer ...所有: own; possess但: only; just; merely由: cause; reason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:归客户所有但由电话公司维护的设备，即可在微信中查询翻译
