[机] 煤炉
1. 煤炉：煤焦油 coal tar | 煤炉 coal furnace | 煤气 coal gas
2. 燃煤炉：coal feeder 给煤机 | coal furnace 燃煤炉 | coal gas 煤气
1. coal furnace
1. Yang has to place coal in the furnace several times a day.
2. Coking coal is processed into coke, a key material in blast furnace production of steel.