A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A temporary manhole cover includes a hinge to permit a portion of the cover to be pivoted open and closed. And a roller for use with a hose or rope facilitates cleaning and inspection of the manhole.
A temporary manhole cover includes a hinge to permit a portion of the cover to be pivoted open and closed. And a roller for use with a hose or rope facilitates cleaning and inspection of the manhole.
Safety grate
HARAZIM PAUL (author)
2019-12-17
Patent
Electronic Resource
English
IPC:
E02D
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