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основная камера сгорания stresses
Apollo-Soyuz	main thrust chamber
astronaut.	main combustion chamber (ЖРД); main combustor
auto.	main combustion chamber (в предкамерном двигателе); main combustion chamber
avia.	main burner; primary burner; primary combustor
mil.	main combustion chamber (двигателя)

основная камера сгорания: 6 phrases in 4 subjects

Astronautics	1
Aviation	2
Combustion gas turbines	1
Energy industry	2