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Content
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Melika
@melikafrj
Tunnel building,TBM segment
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Asr7šŸŽ­
@asr7777777
They consist of a rotating cutting head at the front, a cylindrical body or shield to protect workers and equipment, and a system for removing excavated material from the tunnel.
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Melika
@melikafrj
Thanks for sharing your experience
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