To ensure that new or upgraded systems support this need, software development teams must adopt their own rigorous methods for tracing business requirements throughout the system development process.
为确保新的或者升级的系统支持这个需求，软件开发组必须采用他们自己的严格的方法在整个系统开发过程中来追踪商业需求。
A simple and practical process design methods of steam tracing systems is introduced in the article.
介绍一种简单实用的蒸汽伴热系统的工艺设计方法。
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