付款条件的英文表达 — 国际贸易填空题

某出口公司与中东客户签订一批陶瓷餐具合同，付款条件约定为：签约后买方先电汇30%货款作为定金，其余70%货款凭提单副本以电汇付清。请补全合同中的英文付款条款（在空格处填入一个最恰当的英文单词）：Payment shall be made by T/T, with 30% of the contract value paid in ____ and the remaining 70% to be paid against the copy of B/L.