时当信用证规定
When stipulated in the letter of credit
以上为机器翻译结果，长、整句建议使用 人工翻译 。
一般来说，当交易达成时，买方就有义务在合同规定的时间内通过其往来银行开立信用证。
Generally speaking, when trades achieves, the buyer has the duty in the contract provision time through its Dealing bank to draw up the letter of credit.
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