井下

• Underground image tracking based on data fusion
  基于信息融合的井下图像跟踪
• Practices on dynamic water grouting and sealing in coal mine
  煤矿井下动水注浆堵水实践
• On how to carry out prospecting drainage in small coal mines
  小煤矿如何进行井下探放水
• Verification regulation of electronic downhole pressure gauge
  电子式井下压力计检定规程
• Specification for subsurface safety valve equipment
  井下安全阀设备的规范
• The study and practice of the turbine flowmeter of downhole
  井下涡街流量计的研究与实践
• Steelcord conveyor belts for underground coalmining ; testing
  井下采每用钢索输送带.检验
• Steelcord conveyor belts for underground coalmining ; marking
  井下采煤用钢索输送带.标记
• Preliminary analysis on cause of an ignition accident
  一起井下变电所着火事故的原因浅析
• Need to monitor the application of various mine sites
  适用煤矿井下各种需要监控的场所。