принудительная система пожарного дренирования

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plenum system (вентиляции или отопления)

принудительная система: 92 phrases in 36 subjects

Aerohydrodynamics	2
Armored vehicles	5
Astronautics	3
Automobiles	1
Aviation	3
Cables and cable production	1
Cinematography	2
Computers	2
Electronics	3
Energy industry	7
Environment	1
Firefighting and fire-control systems	1
General	2
Human resources	1
Information technology	2
Makarov	3
Mass media	2
Military	3
Mining	1
Nautical	4
Nuclear and fusion power	2
Oil / petroleum	2
Oil and gas	2
Packaging	1
Polygraphy	2
Public utilities	1
Refrigeration	2
Roll stock	1
Sakhalin	1
Security systems	1
Solar power	3
Technology	15
Telecommunications	3
Thermal engineering	3
Transport	3
Water resources	1