矿山压力观测
mine pressure observation
矿山设备维修
mining equipment maintenance
矿山压力
mining pressure
underground pressure
rock pressure
underground rock pressure
ground pressure
rock presure
strata behaviors
rock pressure in mine
mine pressure
strata bumping
矿压观测
underground pressure
mine pressure observation and measurement
mineral pressure observation
strata behaviors observation
underground pressure observing
Observation of Underground Pressure
pressure observation
mine pressure observation
pressure observation and measurement
pressure practice
许用矿山设备
permissible mine equipment
气化关键设备压力容器
pressure vessels of shell gasification key equipme
Pressure Vessels of Shell Gasification Key Equipment
pressure vessels of shell gasification
压力设备指令
pressure equipment directive
扬压力观测
Uplift pressure observation
油缸压力测压螺塞
cylinder pressure pickup plug
前兆观测设备
precursory observation device
precursory observation devices
天文观测设备与技术
astronomical facilities and technique