China National Standards

China Hygienic standard cobalt GB Standards List


  •  China "Hygienic standard cobalt" GB Standards List:
  • Standard  Code Standard Title Standard Class Order
    GB 11529-1989 Hygienic standard for cobalt and its oxides in the air of workplace
    车间空气中钴及其氧化物卫生标准
    China National Standards
    Hygienic standard cobalt

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