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留置权是指债权人合法地占有债务人的动产之后,若届期债务人不履行债务的,债权人就可以留置该动产并对其享有变价优先受偿的权利。双务合同履行中的抗辩权是指在一方当事人行使履行请求权时,另一方当事人在合法情况下暂时拒绝偿还其债务的权利。二者最大的相同之处,就是都是为了给一方当事人的债权或者预期的财产收益提供一个保障。在贯彻执行的过程中,几种制度仍然存在一些缺陷,本文对留置权与双务合同履行中的抗辩权作出比较且对抗辩权体系进行重构。
The lien means that after the obligee legally holds the movable property of the debtor, if the debtor fails to perform its obligations, the obligee may retain the movable property and enjoy the priority of repayment of the variable price. The defense right in the performance of dual-service contract refers to the right of another party to temporarily refuse to repay its debts when one party exercises the performance right according to lawful circumstances. The two most common are both to provide a guarantee for one party’s claims or expected property gains. In the process of implementation, there are still some shortcomings in some systems. This article compares the right of defense in the performance of lien and dual service contracts and reconstructs the right of defense system.