Expounds the revision principles of the code from the three ideas of quality control of modern products, i. e., process control, total control and key point control. The revised code requires a decreased grade of terminal filters and reduced cross-section area of working zone, air supply velocity and air change rate. The code adds the appendixes of project acceptance, inspection and assessment to enhance process control.%从现代产品质量控制的三个理念即过程控制、全面控制和关键点控制阐述了规范修订的原则.修订的规范对末级过滤器级别要求放宽,工作区截面风速和换气次数有所降低.为加强过程控制,修订后的规范增加了验收检查项目及评估的附录.
展开▼