1971NF F37-030:1971 RAILWAY TRANSPORT EQUIPMENT. TANK WAGONS FOR CHEMICALS CARRIED AT ATMOSPHERIC PRESSURE. DOME COVER FOR COCKS FIXED WITH PINS. FILLING AND DRAINING ORIFICES 80 MM IN DIAMETER.
1970NF F37-032:1970 RAILWAY TRANSPORT EQUIPMENT. TANK WAGONS FOR CARRYING CHEMICALS IN LIQUID FORM. LOCATION OF FILLING AND DRAINING DEVICES.
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).