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NBN 739 : 70 ADD 3 89 CALCULATION OF BOILER PARTS - UNANCHORED FLAT BOTTOMS OF CYLINDRICAL BOILER SHELLS SUBJECTED TO EXTERNAL PRESSURE
NBN 837 : 1971
NBN 911 : 1972
NBN A 25 102 : 1976 TUBES EN ACIER SANS SOUDURE POUR COLLECTEURS DE CHAUDIERES POUR TUYAUTERIES INTERNES ET DE LIAISON DE CHAUDIERES ET D'APPAREILS SOUMIS A PRESSION - NUANCES ET QUALITES
NBN 740 : 70 ADD 2 86 BEREKENING VAN DE KETELELEMENTEN - VERSTERKING VAN DE OPENINGEN IN NIET VERANKERDE BODEMS ONDER INWENDIGE DRUK
NBN D 01 001 : 1978 CENTRAL HEATING, VENTILATION AND AIR CONDITIONING - PARTICULAR REQUIREMENTS FOR HIGH PRESSURE INSTALLATIONS (WITH HOT WATER OR STEAM)
NBN 735 : 70 ADD 4 89 CALCULATION OF BOILER PARTS - CYLINDRICAL BOILER SHELLS SUBJECTED TO INTERNAL PRESSURE
NBN 731 : 70 AMD 4 89 CALCULATION OF BOILER PARTS - GENERAL PRINCIPLES

NBN 733 : 70 ADD 3 89 CALCULATION OF BOILER PARTS - PIPES SUBJECTED TO EXTERNAL PRESSURE
NBN 734 : 70 ADD 1 89 CALCULATION OF BOILER PARTS - PIPINGS SUBJECTED TO INTERNAL PRESSURE
NBN 731 : 70 AMD 4 89 CALCULATION OF BOILER PARTS - GENERAL PRINCIPLES
NBN 732 : 70 ADD 3 89 CALCULATION OF BOILER PARTS - PIPES SUBJECTED TO INTERNAL PRESSURE
NBN 736 : 70 ADD 3 89 CALCULATION OF BOILER PARTS - HEATED CYLINDRICAL BOILER SHELLS SUBJECTED TO EXTERNAL PRESSURE
NBN 735 : 70 ADD 4 89 CALCULATION OF BOILER PARTS - CYLINDRICAL BOILER SHELLS SUBJECTED TO INTERNAL PRESSURE

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