Each Annunciator can have up to two Horn relays and two Group relays and each alarm channel can be configured to drive any of these common relays.是什么意思_Each Annunciator can have up to two Horn relays and two Group relays and each alarm channel can be configured to drive any of these common relays.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句