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Curiosities and wonders
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Disasters
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Natural disasters
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Earth movements
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Subsidences (Earth movements)
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Mine subsidences
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Ground control (Mining)
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Pillaring (Mining)
Pillaring (Mining)
Topic
sh85102141
·
id.loc.gov
Used for
Robbing pillars (Mining)
Broader Terms (2)
Ground control (Mining)
Mining engineering
Hierarchy
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