雷电防护等级 lighting protection level ; thunderbolt shield grade ; rating of lightning protection
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The application of line surge arrester is an important measure to enhance the lighting withstand level and atmospheric overvoltage protection level of electric transmission line.
提出采用线路避雷器是提高输电线路耐雷水平的一个重要措施。同时提高了安装杆塔的大气过电压保护水平。
LED in the light principle, energy saving, environmental protection level is far superior to the traditional lighting products.
LED在发光原理、节能、环保的层面上都远远优于传统照明产品。
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