The issue is that you have no element in your purchase order that identifies it.

问题是，鉴别它的购买订单中没有元素。

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Issue the purchase order and release to supplier and chase the delivery performance;

下采购订单，发送给供应商并且追踪发货情况；

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Buyer shall issue the purchase order sheet by 60 days before the delivery time.

买方应在发出采购订单表，由前60天交货时间。

youdao

Buyer shall issue the purchase order sheet by 60 days before the delivery time.

买方应在发出采购订单表，由前60天交货时间。

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