| Approval of rules for certification of welders and welding specialists.
Об утверждении правил аттестации сварщиков и специалистов сварочного производства. |
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SP 52-105-2009Concrete structures for cold climate and … |
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Gosnadzor Приказ N 97 от 14.02.2012Rostekhnadzor Order of February 14, 2012, reg. … |