Segment structure for preventing jamming at position of transverse channel of subway and construction method of segment structure
The invention relates to a duct piece structure for preventing jamming at a subway transverse passage position and a construction method thereof, and belongs to the technical field of shield duct pieces, the duct piece structure comprises a non-holed area duct piece and a holed area duct piece, a ho...
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Format: | Patent |
Sprache: | chi ; eng |
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