secondary environment

Environment friendly, healthy products, completely avoid the secondary pollution and great noise of conventional vacuum cleaners.

环保 、 健康型产品, 完全避免了拖走式吸尘器造成的有害的二次污染和很大的噪声.

The field test result of the maintaining terminal shows that it is an effective and satisfying way to the debugging and on line maintenance in the unmanned monitoring system of telecommunication equipment and environment. The System of Automatic Monitor of Secondary Front End

现场的实际试运行情况表明，该维护终端技术的引入不仅大大提高了通信机房无人值守系统的技术水平，同时也为系统工程实施中的安装调试和日常在线维护提供了高效便捷的手段与工具

Test results indicate that the HAP can be used as green environment protection material, as the result of its strong ability of absorbing F-ion under the operating conditions of common temperature and common pressure and non-secondary pollution.

探讨了吸氟机理和行为.结果表明：sol－gel法合成的HAP在常温、常压、不调pH的操作条件下，有较大的吸氟能力，且无二次污染，可作为绿色环境材料。

Class Environment of Primary and Secondary School and Cultivation of the Students' Creativity

中小学班级环境与学生创造力培养研究

Controlling environment pollution by biotechnology has the advantages of low cost and no secondary pollution.

应用生物技术治理环境污染,具有费用低、不产生二次污染的优点.

TRENDS Research on Polychlorinated Biphenyls Pollution Levels and Its Richness Tendency in the Secondary Environment

次生环境多氯联苯污染水平监测及富集趋势研究