互负债务 meaning in English

be in mutual debt

Where the parties owe performance toward each other and there is no order of performance , the parties shall perform simultaneously
第六十六条当事人互负债务，没有先后履行顺序的，应当同时履行。
Where the parties owe performance toward each other and there is an order of performance , prior to performance by the party required to perform first , the party who is to perform subsequently is entitled to reject its requirement for performance
第六十七条当事人互负债务，有先后履行顺序，先履行一方未履行的，后履行一方有权拒绝其履行要求。