China National Standards

China Evaluation method graduation GB Standards List

  •  China "Evaluation method graduation" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 39749-2021 Evaluation method and graduation for energy efficiency performance of insulating glass unit
    中空玻璃隔热保温性能评价方法及分级    		 China National Standards
    Evaluation method graduation
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