A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
An attachment for a ladder includes a pair of spaced rails secured together by at least one rung and a removable pin at an end for securing the attachment to a standard ladder.
An attachment for a ladder includes a pair of spaced rails secured together by at least one rung and a removable pin at an end for securing the attachment to a standard ladder.
RESCUE LADDER ATTACHMENT
HOFFMANN ROSS (author)
2020-08-13
Patent
Electronic Resource
English