letter orders

例句：

1. 1. The letterorders us to deliver the goods by nextFriday.
   这封信要求我们在下周五之前交货。
2. 2.The manager sent a letter order for newoffice furniture.
   经理寄来了一份新办公室家具的订单。
3. 3. The company issued a letterorder for the new product.
   公司发出了新产品的订单。