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MSS SP-110-2010 (includes errata)
Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends (includes errata sheet)
Covers round opening, full, regular and reduced port metal ball valves. Errata sheet is included in the SP
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Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. [mss]