这笔钱借你用三十天，不计利息。
乙方归还车辆7天以后，甲方退还乙方不计利息的押金余额。
Party B will be refunded the deposit without interests after 7 working days of the leased car returned.
乙方归还车辆15天以后，甲方退还乙方不计利息的押金余额。
Party B will be refunded the deposit without interests after 15 working days of the leased car returned.
应用推荐