[电] least voltage coincidence detec-tion
zuì xiǎo diàn yā xiāng hé jiǎn bō ㄗㄨㄟˋ ㄒㄧㄠˇ ㄉㄧㄢˋ ㄧㄚ ㄒㄧㄤ ㄏㄜˊ ㄐㄧㄢˇ ㄅㄛ