The principle and method of preferential order evaluation was described.

介绍了优序评价的原理和方法。

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Welcome you to order, price preferential benefit, quality assurance!

欢迎您预定，定价优先好处，质量管理！

youdao

Welcome you to order, price preferential benefit, quality assurance!

欢迎您预定，定价优先好处，质量管理！

youdao