ÐÓ°ÉÔ°æ - engineering - construction
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Submersible Tube Tunnels (31 77 00)
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For other relevant searches, you might want to try: shotcrete; gunite; lining of tunnel after tunnel excavation; construction of tunnels by installation of fabricated tunnel tubes.
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(31 74 00) Tunnel ÐÓ°ÉÔ°æ