active return loss有源: active回波损耗: return loss; echo loss; acti ...有源平衡回波损耗: active balance return loss光回波损耗: optical return loss回波损耗: echo return loss; echo-loss; return loss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:有源回波损耗，即可在微信中查询翻译
