
BS EN 60811-509. Electric and optical fibre cables. Test methods for non-metallic materials. Part 509. Mechanical tests. Test for resistance of insulations and sheaths to cracking
出版:British Standards Institution

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BS EN 60811-509. Electric and optical fibre cables. Test methods for non-metallic materials. Part 509. Mechanical tests. Test for resistance of insulations and sheaths to cracking
出版:British Standards Institution
专家解读视频