There is another limitation on coal's future in Appalachia: After decades of heavy production, there is less of it to be mined. (apnews.com)
The GE U25B was General Electric's first independent entry into the United States domestic Diesel - electric locomotive railroad market for heavy production Immer wenn Christian «Wilhelms Theke» betrat, nahm ihn die rauchige Gemütlichkeit (myintimcity.com)
Wells, trucks, tanks, and other heavy production equipment can release flammable gases and vapors that can be ignited by open flames, static electricity, friction, or other heat or electrical sources. (mytexasinjurylawyers.com)