回波防護電路echo: n. (pl. echoes) 1.回聲,反響;共鳴,反 ...protection: n. 1.保護,保衛(wèi),防御,掩護,包庇,照顧 (from ...circuit: n. 1.(某一范圍的)周邊一圈;巡回,周游;巡回路線[ ...echo circuit: 回波電路circuit protection: 電路保護產(chǎn)品下載手機詞典可隨時隨地查詞查翻譯