Since the purchase order contains no detailed product information, a separate query is needed to find the product details from the product table.

因为采购订单不包含详细产品信息，所以需要进行单独查询，以便从产品表中查找产品详细信息。

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Create a join between the purchase order and the product table to get product details.

在采购订单和产品表之间创建联接以获取产品详细信息。

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Time of delivery is within 3 month after receipt of the purchase order, down payment or irrevocable confirmed letter of credit, as well as clarification of all technical details.

交货期为收到合同（包括明确的技术附件协议）和预付款（或开具信用证）后3个月内。

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The documents show details of daily life, such as how heavy wax candles were a crucial purchase in order for 15th century worshippers to see the Eucharist during Mass.

BBC: Will of Bishop Walter de Suffield