Miners are finished extracting coal here , and the sides of the tunnel have been sprayed with quicklime to suppress explosive coal dust .

矿工们已经完成了这里的煤炭开采，坑道两壁都喷上了生石灰以防止煤尘爆炸。

The supply of quicklime desiccant , desiccant silica gel desiccant environmental protection plant .

供应生石灰干燥剂,环保干燥剂硅胶干燥剂厂。