A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A collapsible ladder with steps that remained stored within the frame or automatically deploy for use. The ladder can be manual, semi-automatic, or remote controlled.
A collapsible ladder with steps that remained stored within the frame or automatically deploy for use. The ladder can be manual, semi-automatic, or remote controlled.
Collapsible ladder
CARTER JOHN W (author)
2024-04-09
Patent
Electronic Resource
English