502.15-20 days prior to the date of delivery,you should pay against the presentation of the draft drawn on the opening bank.presentation draft drawn

502.15-20 days prior to the date of delivery,you should pay against the presentation of the draft drawn on the opening bank.presentation draft drawn
502.15-20 days prior to the date of delivery,you should pay against the presentation of the
draft drawn on the opening bank.
presentation
draft drawn

502.15-20 days prior to the date of delivery,you should pay against the presentation of the draft drawn on the opening bank.presentation draft drawn
在交货期15-20天前,贵方应凭开户银行开具的汇票付款
presentation 这个词就是开户银行给你“提示”票据的意思
draft “汇票”的意思
drawn “开具”这是个动词,这里用被动,意思是the opening bank开具的票据
再不懂的地方可以问我,我们一起讨论.