September 3, 2015 Source: U.S. Energy Information Administration, , and Mine Safety and Health Administration Coal mining productivity increased in 2013, averaging 5.5 short tons per miner hour, reversing a trend of declining productivity since at least 2000. Preliminary data from the Mine Safety and Health Administration indicate a further increase in 2014. Improved productivity […]
International Oilfield Equipment Procurement | Toll Free: 877-645-6693
