China National Standards

China Wellens GB Standards List

  •  China "Wellens" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 21816-2008 Testing of chemicals - Inherent biodegradability - Zahn-Wellens test
    化学品 固有生物降解性 赞恩-惠伦斯试验    		 China National Standards
    Wellens
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