采掘

• The miners worked at the face for 5 hours
  矿工在采掘面上工作了5小时。
• Mining district design and mine ventilation
  矿井的采掘布局与通风工作
• Glossary of mining terms - strata control
  采掘术语.第11部分:地层控制
• Glossary of mining terms - shafts and associated equipment
  采掘术语.第9部分:竖井和辅助设备
• A tool or machine used for digging or excavating
  挖掘器，挖掘机用于挖掘或采掘的工具或机器
• Cemented carbide for coal - mining tools
  煤炭采掘工具用硬质合金制品
• Glossary of mining terms - electrical engineering and lighting
  采掘术语.第7部分:电气工程和照明
• Discussion on increasing gear intensity of coal mining machinery
  提高采掘机械齿轮强度问题的探讨
• Long service life percossive rock drilling rods
  工业炸药和凿岩机发明后困扰世界采掘工业的百年难题
• Excavation engineering charts and management of mineral resources
  采掘工程图件与矿产资源管理的关系