When specified, the valves are available in the alloys shown below which are suitable for steam, water, oil, oil vapor, gas and general services.是什么意思_When specified, the valves are available in the alloys shown below which are suitable for steam, water, oil, oil vapor, gas and general services.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句