| 摘要 |
Improvements in which the securing unit is formed by a free-standing base frame which includes two encircling (bracket) bodies linked to a drive device for the translational movement of said bodies and the transmission of forces in order to create and control the welding pressure between the tubular elements to be joined, said drive device consisting of a translation mechanism actuated by an electric gear motor, specifically an irreversible nut and spindle system. <IMAGE> |
