Do you have many levels in the product type hierarchy?

产品类型层次结构是否分为很多层？

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Similarly any new product types you added in the product type hierarchy can be added into the model with a related set of services if required.

类似地，如果必要的话，添加到产品类型层次结构的任何新产品类型都可以添加到一个具有相关服务集合的模型中。

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Mapping a product in a product type hierarchy into a category establishes the semantic notion of product of type x.

把产品映射到产品类型层次结构中的类别，就可以形成某类型的产品 这样的语义概念。

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In the 1980s, a new type of retirement product began changing the market in the same way exchange traded funds are changing it today.

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The Toronto Exchange in Canada was the first to issue an ETF-type product known as Toronto Index Participation Units (TIP 35) in March 1990.

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Simply type in the product name of the item you are considering and use an online product comparison tool like Google Product Search, NexTag.com or BizRate.com.

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