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with brick, concrete, stone, or similar building materials
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Industry
CPC
E21D5/04
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Parent Industries
E
FIXED CONSTRUCTIONS
E21
Mining
E21D
SHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS
E21D5/00
Lining shafts Linings therefor
Current Industry
E21D5/04
with brick, concrete, stone, or similar building materials
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