beehive coke उदाहरण वाक्य

The mine had 270 employees, and one fatal accident in 1919 . In 1920 Calumet Mine produced 157, 816 tons of coal and 85, 641 tons of coke, there were 260 beehive coke ovens with 150 in operation, and employed 241 men and boys.
After 1900, the serious environmental damage of beehive coking attracted national notice, even though the damage had plagued the district for decades . " The smoke and gas from some ovens destroy all vegetation around the small mining communities, " noted W . J . Lauck of the U . S . Immigration Commission in 1911.