byyourfirstclassbankinourfavouruponsigningSalesContract.
Shipmentwillbeeffectedwithin25daysafterreceiptoftherelevantL/CissuedbyyourfirstclassbankinourfavouruponsigningSalesContract.这个句子中byyourfirstclassbankinourfavouruponsigningSalesContract应该如何翻译?