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structurally associated with rock crushers
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Industry
CPC
E21D9/0657
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Parent Industries
E
FIXED CONSTRUCTIONS
E21
Mining
E21D
SHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS
E21D9/00
Tunnels or galleries, with or without linings Methods or apparatus for making thereof Layout of tunnels or galleries
Current Industry
E21D9/0657
structurally associated with rock crushers
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