安徽省颖上县谢桥煤矿地测科
Section of Land Surveying of Xieqiao Mine of Yingshang County
安太堡露天煤矿排土场
Dump of Antaibao Opencast Coal Mine
超大截面煤矿用移动金属屏蔽软电缆
super-large size flexible cables with metal shield for mobile applications in coal mines
郴州华塘煤矿
Chenzhou China pond coal mine