1.   Hills were scraped bare and gutted for coal mines and coke ovens.

2.   Looking into the glowing mouth of the coke ovens, a man could almost imagine what hell was like.

3.   The two-hour bombardment destroys the huge steel mill and its adjoining coke ovens.

4.   In addition to paper mills, other enterprises that were closed included gold, lead and zinc mines, coke ovens, tanneries and oil refineries.