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срабатывание клапана stresses
gen.	valve operation (Svetozar)
Apollo-Soyuz	cycling
O&G	valve actuation
tech.	valve reaction

срабатывание клапана: 54 phrases in 17 subjects

Apollo-Soyuz	3
Astronautics	3
Caspian	2
Construction	1
Drilling	1
Energy industry	4
Firefighting and fire-control systems	2
General	1
Machinery and mechanisms	12
Nanotechnology	1
Nuclear and fusion power	2
Oil / petroleum	1
Oil and gas	2
Oil and gas technology	3
Oils and lubricants	1
Technology	14
Transport	1