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made from concrete or from natural or artificial stone
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Industry
CPC
E01B3/28
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Parent Industries
E
FIXED CONSTRUCTIONS
E01
Road, railway construction
E01B
PERMANENT WAY PERMANENT-WAY TOOLS MACHINES FOR MAKING RAILWAYS OF ALL KINDS
E01B3/00
Transverse or longitudinal sleepers Other means resting directly on the ballastway for supporting rails
Current Industry
E01B3/28
made from concrete or from natural or artificial stone
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