针对产品并行设计过程特点，提出一种分层递阶(三层七阶段)的产品可制造性评价策略。

A hierarchy evaluation method of three levels and seven stages of product manufacturability is presented based on the process of product concurrent design.

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一切通知可经专人送递，或以附有确认收据的传真方式送递随后再于24小时内以头等邮件方式邮寄，或以隔夜速递的方式送递。

Any Notice may be delivered by hand or sent by fax with confirmation receipt followed by first-class mail posted within 24 hours, or by overnight Courier.

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