A platform for research: civil engineering, architecture and urbanism
The current invention concerns an improved ladder assembly.
La présente invention concerne un ensemble échelle amélioré.
The current invention concerns an improved ladder assembly.
La présente invention concerne un ensemble échelle amélioré.
FOLDABLE LADDER ASSEMBLY
ENSEMBLE ÉCHELLE PLIABLE
CALLAERTS SIMON (author)
2019-12-26
Patent
Electronic Resource
English