Group strength
Non-excavation construction
Published:
2019-09-29 17:45
Source:
Within the company
Key words: construction contractor
Modern non-excavation engineering non-excavation underground pipeline construction methods have appeared in large numbers since the 1970s, including: horizontally guided drilling, horizontal directional drilling, horizontally controlled auger, impact spear, fistula hammer , micro-channel, old tube replacement and repair, pipe jacking machine, etc.
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