naaqs

英

美

网络国家环境空气质量标准

Within nine months after promulgation of an naaqs, each state was required to submit to EPA a plan designed to implement and maintain that standard within its boundaries.
在《全国环境空气质量标准》颁布后的9个月时间内，要求各州报送环境保护局一份计划，说明在本州实施与维持该标准的措施。
But what if a state is unable to achieve timely attainment of an NAAQS in one of its air quality control regions?
但是如果一个州不能及时达到《全国环境空气质量标准》，并且是在州属空气质量控制区域，那该怎么办呢？
The formation mechanism of the frequently asked question ( FAQ) in remote intelligent answer question system 2 develop a Network Automatic Answer Question System ( NAAQS) running on the Internet.
远程智能答疑系统中FAQ的形成机制2采用三层体系结构架构系统，设计并完成了基于J2EE体系结构的网络自动答疑系统NAAQS。
Combing with the enforcement of vehicle emission standards all over the world, the article elaborates domestic enforcement of emission standards on city bus and points out that electronic fuel injection is the key technology to realize 3-class NAAQS ( national ambient air quality standard).
文章结合世界各国机动车尾气排放的实施，阐述目前国内城市客车排放法规的实施情况，指出电控燃油喷射是实现国Ⅲ排放的关键技术。