China National Standards

China 3：Steel GB Standards List

  •  China "3：Steel" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 25020.3-2010 Steel pole for overhead contact system of electrified railway - Part 3：Steel tube pole
    电气化铁路接触网钢支柱 第3部分：环形钢管支柱    		 China National Standards
    3：Steel
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