NF 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.
2003NF F37-100-5:2003 Railway applications - Tank wagons - Part 5 : top devices for bottom emptying and top filling of liquid products.
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.