问题描述：
by your first class bank in our favour upon signing Sales Contract.
Shipment will be effected within 25 days after receipt of the relevant L/C issued by your first class bank in our favour upon signing Sales Contract.这个句子中by your first class bank in our favour upon signing Sales Contract应该如何翻译?
Shipment will be effected within 25 days after receipt of the relevant L/C issued by your first class bank in our favour upon signing Sales Contract.这个句子中by your first class bank in our favour upon signing Sales Contract应该如何翻译?
问题解答：
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