请开信用证信函

    Dear Sirs，    We thank you very much for your order NO．DF-16 March 28 with which you have sent us your shipping instructions．The goods of your order are being manufactured for shipment．    You informed us that you will arrange to open an irrevocable L／C in our favour，valid until May 30 and we ask you to send it promptly．    Upon arrival of the L／C we will pack and ship the goods urgently as requested in accordance with your shipping instructions．We assure you that we will make complete shipment so that we can give you perfect satisfaction．    Yours faithfully，    中文对照    敬启者：    贵方3月28日寄来的DF－16号订单及其装船通知均已收到，至为感激。    贵方订购的产品正准备交运中。贵方通知我们将依我方意思开出一份5月30日前有效的不可撤销信用证，请贵方立即寄来。    信用证一到，本公司就依照贵方装船通知单上的要求立即包装启运。本公司向贵方保证，我们将作完整的装运，让贵方完全满意。    ×××敬上