This paper presents the classification of zone for hazardous area, marking for ex electrical equipments, selection of ex equipment and the design on electrical wiring used in explosive atmosphere.
文章阐述了爆炸性粉尘环境、爆炸性气体环境危险区域的范围划定，防爆电气设备的标志、防爆电气设备的选型及爆炸性环境电气线路的设计。
The ex-Milan man presented a thesis on 'The coach, and management of human resources', while Ferrara illustrated 'The concept of defense and man marking'.
前米兰球星科斯塔库塔表达了自己“教练，人力资源管理者”的理论，而费拉拉阐述了他对“防守和盯人概念”的理解。
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