基础契约可以包含任何契约条款和条件，但通常有目录筛选条款和条件，它定义销售哪些产品和销售价格是多少。

The base contracts can contain any contract terms and conditions, but usually have the Catalog Filter term and condition that defines which products are for sale and at what price.

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产片的批发价格是高度透明的，公司目录上少少的价格就说明了大部分的销售状况，这也表明唱片公司很有可能在制定价格表上达成一致。

Wholesale record prices are highly visible—a few prices in company catalogues account for the bulk of sales—which suggests that firms could plausibly co-ordinate on an agreed tariff.

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手头上有产品广告，打印好的网页，或是价格的目录和款项，就能展示给销售人员，然后获得可以预见的折扣。

Arming yourself with advertisements, printed Internet pages or notes on pricing and policies offers a visible comparison to show a salesperson.

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