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API STD 623-2013 Steel Globe Valves-Flanged and Butt-welding Ends,Bolted Bonnets



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API SPEC 6D API STD594 API STD598 API STD599 API STD600 API STD602 ...Valves-Flanged And Welding Ends Bolted Bonnet Steel Gate Valves For Petroleum...
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bolted | bolted bonnet | bolted fault | double bolted land | double bolted | on bolted palms | flanged | welding |