China National Standards

China 1:Tubing GB Standards List

  •  China "1:Tubing" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 34020.1-2017 Double wall copper-brazed steel tubes—Part 1:Tubing system for refrigerator
    双层卷焊钢管 第1部分：冰箱管路系统用管    		 China National Standards
    1:Tubing
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