China National Standards

China ～80 GB Standards List

  •  China "～80" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB 11724-1989 Health standard for dust containing 50%～80% free silica in the air of workplace
    车间空气中含50%～80%游离二氧化硅粉尘卫生标准    		 China National Standards
    ～80
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