1、 - , Metal Ball Valves Flanged, Threaded and Welding Ends API 608 , 2012 This Standard has been translated by the Scientific and Industrial Valve Manufacturers Association with the permission of the American Petroleum Institute (API). This translated version shall not replace nor supersede the Engli
2、sh language version which remains the official version. API shall not be responsible for any errors, discrepancies or misinterpretations arising from this translation. No additional translation or reproduction may be made of the Standard without the prior written consent of API. - (API). , . API , ,
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