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permanent rotating magnetic field separator
permanent rotation
permanent rural residents
permanent scatterer SAR interferometry
permanent shadow region
permanent slope
permanent sprinkler system
permanent succession
permanent summation
permanent swap file
permanent threshold shift
permanent threshold shift,PTS
permanent tooth
permanent way overhaul train
permanent way tamping machinery
Permanent wilting point
permanganate index
permatron
permeability
permeability blind zone
permeability calculation
permeability coefficient
permeability determination method
permeability effect
permeability heterogeneity intensity
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