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орудия главного калибра stresses
mil., artil.	main guns; primary armament (береговые, корабельные)
nautic.	main armament; main battery; major caliber
shipb.	main battery guns
орудие главного калибра
mil., nautic.	main gun; major caliber
nautic.	primary gun; major-caliber weapon

орудия главного калибра: 5 phrases in 3 subjects

Military	1
Nautical	2
Technology	2