交叉汇率（套汇汇率）是从两个与同一货币有关的汇率中计算出来的、本来没有汇率的两种货币之间的汇率。
Cross rate is the rate two currencies without exchange rate calculated from two exchange rates which are related to the same currency .
卢布对美元的平均内隐交叉商业汇率
Average implicit cross-commercial rate of the rouble to the US dollar
交叉汇率