双层分采完井
two-zone single selection completion
按煤种分层开采
mining in slices according to coal rank
单管分层开采
single-string selective zone production
分层开采
zonal production
slice mining
slice
production from separate zones
separate zone production
slicing recovery
zonal withdrawal
selective zone production
layer mining
stage development
slicing
leaf mining
slicing mining
mining in slices
the layering mining
slice m ining
双管双层分采完成井
two-tubing dual completion well
Mantel-Haenszel分层分析
Mantel-Haenszel stratified analysis
电网分层分区
power system delamination and subarea
多层分层压裂
multiple separate layers fracturing