DB31/T 754-2013《安全生产特种作业操作证编码技术规范》
本标准规定了安全生产特种作业操作证代码的结构和编码方法。本标准适用于安全生产特种…实施日期：2014-03-01
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- NY/T (1,404)
- DB23/T (1,402)
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- JT (1,379)
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- DB62/T (1,354)
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- DB5227/T (39)
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- JAG (38)
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- HAD (12)
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- DB42 (9)
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