BS 7350-1990 —ouble regulating globe valves and flow measurement devices for heating and chilled watBS 7350-1990 —ouble regulating globe valves and flow measurement devices for heating and chilled water systems
部份国外标准涉及版权问题,所以全部国外标准于2013年02月,全部删除!相关页面仅提供参考消息。