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необходимое условие stresses
gen.	condición necesaria; condición sine qua non
forestr.	requerimiento m
law	requisito necesario; condición indispensable (sankozh); requisito n
law, lat.	sine qua non
необходимые условия
gen.	requisitos m; condiciones necesarias
law	requisitos necesarios (Wiana)

необходимое условие: 4 phrases in 2 subjects

Aviation	1
Law	3