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vital center stresses
med.	жизненно важный центр (центральной нервной системы)
English thesaurus
vital center
mil., logist.	Basis of the enemy's will, or essential part of his combat or endurance capability. Vital centers represent objectives at the strategic level of war which, if destroyed or neutralized, will induce the defeat of the opponent or the negotiation of an acceptable solution in a more or less distant future. They can be: 1. political decision-makers; 2. political and strategic organizations, enabling the enemy to conduct the war; 3. infrastructure and resources; 4. armed forces. (FRA)

vital center: 2 phrases in 2 subjects

Firefighting and fire-control systems	1
Taxes	1