1) four-level protection
四重防护
1.
The significance and necessity of webpage tamper-proofing are discussed,and its general technique framework is analyzed,then technical features and advantages of four-level protection of webpage management are discussed.
论述了网页防篡改的现实需求和意义,分析了网页防篡改总体技术框架,探讨了网页管理的四重防护措施的技术特点及优势,并结合电力系统企业门户网站给出了网页管理实施方案。
4) four protection barriers
四重保护屏障
1.
In order to keep safe operation of nuclear power plant,and prevent the inadvertent release of radioactive fission products,four protection barriers have been designed in design and engineering of nuclear power plant.
为确保核电站运行安全,防止核电站正常运行或事故状态下放射性物质泄漏外逸,在核电站的设计和建造中,就考虑到对核电站进行四重保护屏障的设计,而核电站辐射监测系统则是确保四重屏障核安全的重要措施之一。
5) heavy concrete shield
重混凝土防护层
6) four element system protection valve
四元系统安全防护阀
补充资料:四重八重
【四重八重】
(名数)比丘戒之四波罗夷罪与比丘尼戒之八波罗夷罪也。(参见:波罗夷)
(名数)比丘戒之四波罗夷罪与比丘尼戒之八波罗夷罪也。(参见:波罗夷)
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条