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General Post Office Radio for merchant ships
performance specifications
Engels | 49 pagina's | His Majesty's Stationery Office, London | 1947
Gedrukt boek
General Post Office Radio and radar for merchant ships
a performance specification for the climatic and durability testing of marine radio and radar equipment
Engels | 6 pagina's | His Majesty's Stationery Office, London | 1947
Gedrukt boek
General Post Office