Abstract Vacuum circuit breaker(VCB) has been widely used in electric power system, especially, it takes most market share of 12 kV power system.是什么意思_Abstract Vacuum circuit breaker(VCB) has been widely used in electric power system, especially, it takes most market share of 12 kV power system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句