China National Standards

China 4：H GB Standards List

  •  China "4：H" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 25020.4-2010 Steel pole for overhead contact system of electrified railway - Part 4：H section pole
    电气化铁路接触网钢支柱 第4部分：H形支柱    		 China National Standards
    4：H
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