Coal & Iron Mines(Auto)(Aluminium mine was added)

Completely Automatic Coal mine and iron mine，only need diggers for production ，need to be placed on rocks 全自动化煤矿和铁矿，有挖掘机就可以工作，需要放在岩石上 2019. 11. 13 the problem that diggers don't refuel automatically has been completely fixed，just make the gas station and the mines connected to the road and keep the distance betwwen them within 250 meters 挖掘机不自动加油的bug已经修复，把矿井和加油站都连接到路而且距离不超过250米，挖掘机就可以自动加油并且返回工作 added a road connection 增加了一条公路接口 2020. 5. 26 added uranium version 增加了铀矿 2020. 12. 11 added bauxite mine 增加了铝矿 Tips：All the subscribers who found the problem that the mine doesn't work and shows “Quality of Source 0%”，please firstly make sure that you place the mine on ROCKS （just like gravel mines） 另外：矿井不工作，显示资源质量0，请先检查一下是不是放在了岩石上（放石矿的那种地面）