NF F37-025:1968 RAILWAY TRANSPORT EQUIPMENT. TANK WAGONS NITRIC ACID (CONCENTRATION IN EXCESS OF 95 %) TYPE. HEAVY-DUTY FLANGED DOME COVER,PRESSURE DISCHARGE (50 MM AND 80 MM DIAMETER).
2003NF F37-100-5:2003 Railway applications - Tank wagons - Part 5 : top devices for bottom emptying and top filling of liquid products.
1968NF F37-025:1968 RAILWAY TRANSPORT EQUIPMENT. TANK WAGONS NITRIC ACID (CONCENTRATION IN EXCESS OF 95 %) TYPE. HEAVY-DUTY FLANGED DOME COVER,PRESSURE DISCHARGE (50 MM AND 80 MM DIAMETER).