煤块，煤渣; 煤核儿
1. 煤块,煤渣：coal chute ==> 放煤槽 | coal cinder ==> 煤块,煤渣 | coal classification system ==> 煤分类系统,煤炭分类法
1. The coal cinder is mixed with waste from a soda factory and abandoned bay silt in scientific proportion and method.
2. Li attributed its success to a coal cinder and water recycling system in the area.