Quality is designed into the Series 42 (wafer) and 44 (lug) butterfly valves, utilizing the phenolic-backed cartridge seat pioneered by Crane.是什么意思_Quality is designed into the Series 42 (wafer) and 44 (lug) butterfly valves, utilizing the phenolic-backed cartridge seat pioneered by Crane.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句