exchangern.交换器；换热器；兑换商exchangev.交换；兑换n.交换；交易所；兑换；交战exchange coupling交换耦合exchange of ester酯交换exchange of bonds债券交换exchange of visit互访exchange payments外币付款exchange capacity交换容量exchange property交换性质exchange equation[经] 交换公式exchange platform交互平台exchange symmetry交换对称性