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оспоримая сделка stresses
gen.	avoidable transaction (P.B. Maggs ABelonogov); voidable transaction (ABelonogov)
law	contentious transaction (goroshko)
notar.	voidable contract
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law	contest a transaction (Leonid Dzhepko); challenge a deal (Leonid Dzhepko)

оспоримая сделка : 3 phrases in 2 subjects

General	1
Law	2