China National Standards

China Sulphonic acid hardener GB Standards List

  •  China "Sulphonic acid hardener" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 21872-2008 Sulphonic acid hardener for foundry no-bake furan resin
    铸造自硬呋喃树脂用磺酸固化剂    		 China National Standards
    Sulphonic acid hardener
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