Vertaling van "parties have offered to surrender sufficient slots to allow two additional daily " (Engels → Frans) :

The parties have offered to surrender sufficient slots to allow two additional daily competing air services on the Frankfurt-Washington route and one additional daily competing air service on each of the other three routes.
Les parties ont abandonné suffisamment de créneaux horaires pour permettre la création de deux vols quotidiens concurrents supplémentaires sur la liaison Francfort-Washington et d'un vol quotidien concurrent supplémentaire sur chacune des trois autres liaisons.