A written agreement between hostile states regarding the exchange of prisoners.

(交战国)交换俘虏之协约。

A written challenge to single combat.

决斗书；挑战书。

In Europe, a number of industrial establishments which combine by agreement to regulate the output of each, to fix prices, etc.

【商】欧洲之工业同盟。

International monopoly.

卡特尔；国际独占事业。