Based on Gauss optics,the theory of afocal zoom expander is analyzed,a afocal zoom expander is designed and successfully applied.

基于高光学论,分析了无焦连续变倍准直扩束系统的,现了无焦连续变倍准直扩束系统的设,得到了验证.

The main structure have:Electromagnet and Heng galvanism source, numerical type Gauss account(the effect of Huo Er) and ammeter and volt account, have control dish of illuminate the system.

电磁铁和恒流电源、数字式高 （尔效应）、安培和伏特、配有照明系统的控制盘。

A lot of epidemiology consider to discover, expose in more than 2 fine long hair gauss (electromagnetic wave unit of measurement) the person in magnetic field, meet with cancered risk is higher.

许多流行病学研究都发现，暴露在超过2毫高（电磁波量单位）磁场中的人，罹患癌症的风险就比较高。