demo - dip
- detriment
- detrimental effect
- detrimental soil
- detrition
- detrusion ratio
- develop
- developed coal
- developed deposit
- developed field
- developed ore
- developing butt
- developing section
- development
- development and face-entry drivages
- development boss
- development coal
- development district
- development drilling
- development drivage
- development end
- development face
- development heading
- development method
- development of a deposit
- development opening
- development operations
- development ore
- development plan
- development program
- development rate
- development work
- development working
- development workings
- device
- device of automated state control and operation records
- devolatization
- devote
- dew-point
- dewatering
- dewatering area
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