indurated shale

用法例句

The developed sintered brick made from gangue and fly ash as industrial wastes as well as weathered shale as main raw materials has obviously social and economic benefits.

以工业废渣煤矸石、粉煤灰及风化页岩为主要原料研制成烧结砖，具有较明显的社会效益和经济效益。