Рынок труда · 30.06.19971 мин чтения
Safety Standards for Roof Bolts in Metal and Nonmetal Mines and Underground Coal Mines
Локальный автоматический перевод · Язык оригинального источника
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MSHA is extending the comment period regarding the Agency's proposed rule for roof and rock bolts at metal and nonmetal mines and underground coal mines which was published in the Federal Register on April 28, 1997.