usance

• Would you please also guarantee that by the time our usance l / c is due , the accumulative value of your purchase from us will be the same as that of our l / c
  能不能请你保证在我们开的远期信用证到期的时候，你向我们采购的累计总值应该同我们的信用证总值一样。
• Reimbursement : sight letter of credit ( or usance letter of credit from date of delivery order ) to be opened and operable within 15 days from date of contract
  偿付条例：及期信用证（或者从交货单日期计算的远期信用证）将被开列并且在合同建立的十五天之内都可以开列。