短語詞組短語two way break before -make contact 雙向先斷后合觸點(diǎn)double -break -make contact 雙閉觸點(diǎn)break -before-make [通信]先開后合;先斷后合;[電]先斷后通ratio break -make 斷續(xù)比Break -Make Ratio 斷續(xù)比;[電]通斷比;翻譯 返回 break-make