MSS SP 110-2010 螺纹、承插焊、软纤焊、凹槽和外接连接球阀
MSS SP-110-2010Ball ValvesThreaded, Socket-Welding,Solder Joint,Grooved and Flared EndsStandard Prac
MSS SP 110-2010 螺纹、承插焊、软纤焊、凹槽和外接连接球阀