焦炉
1. 炼焦炉：炼钢生铁 pig iron for steel manufacture | 炼焦炉 coke oven | 炼焦煤 coking coal
2. 焦炉：焦化厂coking plant | 焦炉coke oven | 焦炉煤气coke oven gas
1. Coke oven gas is a byproduct of the manufacture of iron and steel.
2. The local steelmaker has upgraded its key equipment to make sure 100 percent of its coke oven gas is used.