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indirect system stresses
sol.pow.	система отопления с замкнутым контуром; система с перераспределением энергии

indirect system: 40 phrases in 14 subjects

Construction	5
Economy	1
Energy industry	2
Firefighting and fire-control systems	2
Makarov	1
Mechanics	1
Military	11
Pharmacology	1
Polygraphy	1
Programming	1
Refrigeration	5
Solar power	2
Technology	5
Thermal engineering	2