An order form is included in the mailing.

随信寄上订单一份。

The goods will be dispatched on receipt of an order form.

订单一到即发货。

You must fill out this order form.

这个订货单你要填一下。

He attached a cheque to the order form.

他在定货单上附了一张支票。

Por.xfdl is a sample purchase order form.

xfdl是一个采购订单表单示例。