China National Standards

China Hygienic standard copper GB Standards List

  •  China "Hygienic standard copper" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB 11531-1989 Hygienic standard for copper dust and fume in the air of workplace
    车间空气中铜尘(烟)卫生标准    		 China National Standards
    Hygienic standard copper
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