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劳动力市场 · 1997/6/301 分钟阅读
Safety Standards for Roof Bolts in Metal and Nonmetal Mines and Underground Coal Mines
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摘要
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.
来源原始语言: Federal Register — Department of Labor打开原始公告 →