NOTE: To prevent premature valve failure it is not recommended that the valve operate in the throttled position with more than 25 ft. pressure differential.是什么意思_NOTE: To prevent premature valve failure it is not recommended that the valve operate in the throttled position with more than 25 ft. pressure differential.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句