fire brick of colliery waste烧结: firing; fritting; cementatio ...煤矸石砖: colliery wastes brick煤矸石: gangue; coal gangue; coal refuses◇煤矸石砖 colliery wastes brick煤矸石利用: utilization of gangue煤矸石砂: coal gangue sand下载手机词典可随时随地查词查翻译