PERFECTIONNEMENTS APPORTES AUX MACHINES A MOULER LES TUYAUX EN BETON

摘要

A supporting ring for casting machines for concrete pipes for use in moulding the socket end of the pipe and as a base for the green pipe during the removal of the casting mould and the initial hardening of the concrete, said ring consisting of a hollow annular body of a closed, preferably substantially rectangular cross-section.