短語詞組短語echo balance return loss 回波平衡返程損耗ive balance return loss 有源平衡回程損耗BRL Balance Return Loss 平衡返回損耗terminal Balance Return Loss 終端平衡回波損耗active balance return loss 有源平衡回程損耗;主動式平衡回波損耗;有源平衡回流損失英語;有源平衡回流損失passive balance return loss 無原均衡回流損失;無源均稀反射波損耗mean echo balance return loss [電子]平均回波平衡返回損耗return loss balance 均衡回流損失 返回 balance return loss