The value chain consists of primary and support activities that together produce the profit margin.
价值链包括主要活动和支持活动，它们共同产出利润率。
Provide design support for product modification and other technical support activities for products in production.
为产品修改提供设计支持，为产品量产提供技术支持。
Provide design support for product modification and other technical support activities for products in production.
为产品修改提供设计支持，为产品量产提供技术支持。
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