矿山法施工
mining method construction
construction by mining method
Mine construction
mine method construction
矿山法隧道
Tunneling by mining method
mined tunnel
Drill and blast tunneling
矿山安全法规
mine safety laws and regulations
冶金部马鞍山矿山研究院；南京大学
MaanShan Institute of Mining Research
冶金部马鞍山矿山研究院环保研究所
Maanshan Environmental Protec-tion Research Institute
哀牢山矿集区
Ailaoshan ore concentration region
安徽琅琊山矿业总公司
anhui langyashan general mining company
白石砬子白钨矿矿床
Baishilazi scheelite deposit
白秧坪—华昌山矿带
Baiyangping-Huachangshan ore belt