Recent highway drainage ditch structure and drainage ditch structure combining short term and long term
The invention provides a short-term road drainage ditch structure and a short-term and long-term combined drainage ditch structure, the short-term road drainage ditch structure comprises a side ditch arranged between a roadway and a crushing table, the side ditch comprises a cover plate and two side...
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Format: | Patent |
Sprache: | chi ; eng |
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