Angielski ⇄ Rosyjski

two-tier rate of exchange akcenty
posp.	двойной валютный курс ('More)
ekon.	двойной курс (e.g. On July 31, 1989, a two-tier exchange rate system was established, comprising an official and free market exchange rates.); двойной курс
polit.	двойной курс валюты (ssn)