China National Standards

China 2：Seam GB Standards List

  •  China "2：Seam" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 4437.2-2017 Aluminium and aluminium alloy extruded tubes—Part 2：Seam tubes
    铝及铝合金热挤压管 第2部分：有缝管    		 China National Standards
    2：Seam
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