[电] exteranl critical damping resist-ance
wài bù lín jiè zǔ ní diàn zǔ ㄨㄞˋ ㄅㄨˋ ㄌㄧㄣˊ ㄐㄧㄝˋ ㄗㄨˇ ㄋㄧˊ ㄉㄧㄢˋ ㄗㄨˇ