48 TRANSPORT | MT 4826 air and space transport | BT1 space vehicle | BT2 space transport | RT aerospace industry [6821] | remote sensing [3236] | satellite communications [3226]
48 TRANSPORTS | MT 4826 transports aérien et spatial | BT1 véhicule spatial | BT2 transport spatial | RT communication par satellite [3226] | industrie aérospatiale [6821] | télédétection [3236]