İşgücü piyasası · 30.06.19971 dk okuma
Safety Standards for Roof Bolts in Metal and Nonmetal Mines and Underground Coal Mines
Yerel otomatik çeviri · Kaynağın orijinal dili
Özet
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.