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发布时间：1989-12-01
实施时间：1989-12-01
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[YS/T 241-1994] 钢球冷墩模具用硬质合金毛坯[已作废]
发布时间：1989-02-23
实施时间：1990-03-01
本标准规定了钢球冷镦模具用硬质合金毛坯的产品分类、技术要求、检验规则与试验方法以及标志、包装、运输和..
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[GB/T 1597-1979] 铱坩埚[已作废]
发布时间：1979-11-23
实施时间：1980-08-01
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