对正式方案进行变更的书面描述。
A written description of a change (s) to or formal clarification of a protocol.
书面描述产品和生产过程的控制系统。
Written description of the control systems for parts and processes during production.
书面描述应当包括参考文献，也可包括合适的图表。
The written description should include references and may involve diagrams if applicable.
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