是一种财务选项，由于合同期内的条款没有变化，因此提供了一种节省资金的方法。正常情况下可以使用全套服务设施，并且在合同期结束时可以选择。
Is a finance option that provides a means of conserving capital as the terms are unchanged for the contract period. Full service facilities are available in the normal way, and there is a choice of options at the end of the contract period.
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