[机] quintuple frequency induction furnace

wǔ bèi zhōu bō gǎn yìng diàn lú ㄨˇ ㄅㄟˋ ㄓㄡ ㄅㄛ ㄍㄢˇ ㄧㄥˋ ㄉㄧㄢˋ ㄌㄨˊ