Improvements introduced in the manufacture of a beam or huge bar extracted, of a single piece (Machine-translation by Google Translate, not legally binding)

摘要

Improvements introduced in the manufacture of a beam or extruded hollow bar, in one piece, having an exterior configuration that is uniform along the length of the beam or bar and is of generally square cross section, as defined in the memory, and a coaxial bore which is of circular cross section, the diameter of the bore having a length that is of the order of six tenths to nine tenths of the length of the longest or each side of the cross section. (Machine-translation by Google Translate, not legally binding)