M40F ISO Ball Valve - Firesafe DN25 to DN150 ANSI Class 150 and ANSI Class 300 | Manualzz
M33V ISO Full Bore Ball Valve API 6D DN50 to DN200 ASME ANSI 150 and 300 | Manualzz
ISO 7121:1986 - Flanged steel ball valves
ISO/DIS 7121 - Metal ball valves for general-purpose industrial applications
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GBV Ball Valve DN ¼" to DN 2½"
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ISO 7121:2006 - Steel ball valves for general-purpose industrial applications
ISO 7121:2016 Buy officially GOST, STB, TCH TR CU, price | Internet-shop 'Standards' - for sale existing technical regulations and information publications
Normas al dia 306 by Revista AENOR - issuu
FLANGED BALL VALVE 515 SERIES - ANSI 150
Donkin Reduced Bore Ball Valves, PN16, EN12266, BS ISO 7121 - AVK UK
Instituto Nacional de Normalización. ISO 7121:2006