DISPOSITIF DE FIXATION ET DE REGLAGE EN HAUTEUR POUR PIECES SIMPEMENT APPUYEES A DES SURFACES DE BUTEE

摘要

1434242 Manhole covers F LARSSON and R LARSSON 17 April 1973 [21 April 1972] 41620/75 Divided out of 1434241 Heading E1G The subject matter is the same as in Specification 1434241 but the claims are directed towards the inner cover-supporting ring of the manhole frame.