information about Longwall mining field
Field Hierarchy
Parent | |||
---|---|---|---|
Chemistry 28.9M papers | Engineering 25M papers | Geography 13.2M papers | Organic chemistry 12.9M papers |
History 8M papers | Archaeology 6.9M papers | Waste management 1.6M papers | Coal 287k papers |
Coal mining 93.7k papers | |||
Current | |||
Longwall mining 3,755 papers | |||
Child | |||
Retreat mining 0 papers | Coal mine bump 0 papers |
Trends
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History