Massive fans at many mines make it feel like you are standing in a wind tunnel. Coating the walls with limestone also can dampen the effects of coal dust.
Coating material of epoxy coal tar has been prolonged in the fields of corrosion protection for long distance pipeline, metal storage tank and oil field facilities.
环氧煤沥青涂料用于长输管道、金属储罐以及油田设备防腐经久不衰。
3
Researchers in California, Oregon and Washington noticed specks of sulfur compounds, carbon and other byproducts of coal combustion coating the silvery surfaces of their mountaintop detectors.