闭路

• Compressed oxygen closed circuit self - contained breathing apparatus
  压缩氧气闭路自带式呼吸器
• Practice of closed water circuit at small coal preparation plant
  小型选煤厂洗水闭路循环的实践
• Optical transmission equipment video cctv
  视讯闭路监视光传输设备
• Closed circuit working supervisory equipment
  闭路式远方监视装置
• Reform and result of washing water closed - cycle in coal preparation
  选煤厂洗水闭路循环改造及效果
• Closed water circuit operation in practice at wangfengang washery
  望峰岗选煤厂洗水闭路循环的实践
• Closed water circuit in practice at zhangzhuang coal mine washery
  张庄矿选煤厂洗水闭路循环的实践
• Circulating closed - loop sprinkler system
  循环闭路喷水灭火系统
• Cltbi closed loop throttle body injection
  闭路回馈式单点喷射
• Closed - circuit oxygen self rescuers
  闭路循环氧气自我救生器