This paper introduces the calculation methods of pressure temperature rating for ASTM materials using in power station valves,and also introduces the relations between pressure and class for high pressure and high temperature power station valves是什么意思_This paper introduces the calculation methods of pressure temperature rating for ASTM materials using in power station valves,and also introduces the relations between pressure and class for high pressure and high temperature power station valves在线翻译_英语_读音_用法_例句