労働市場 · 1997/6/301 分で読めます
Safety Standards for Roof Bolts in Metal and Nonmetal Mines and Underground Coal Mines
ローカル自動翻訳 · 情報源の原言語
概要
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.