保护防爆灯具
explosion proof luminaire
电保护防腐
electrical protective antiseptic
反差控制紫外线防护护目镜
ultraviolet contrast-control safety goggles
防爆防腐
explosion proof and corrosion protection
防爆防火灭火装置
explosion-proof and fireproof and fire extinction device
预防保护类
prevention and protection type
材料保护保养
material protection and maintain
液—气渗透防护
liquid-vapor permeation protection