Method and apparatus for forming spiral grooves internally in me

Method and apparatus for the corrugating of metal tubes

Method and device for rotating and machining bar material

Method for manufacturing tubes

Method for rolling tube blanks in a planetary skew rolling mill

Method for the inner profiling of tubes or pipes

Method of intermittent straightening of wire

Method of producing a heat transfer tube for single-phase flow

Methods of fabricating mechanized welding wire

Process and apparatus for the intermittent straightening of wire

Roll assembly for a rolling mill

Roll head for a planetary crossrolling mill

Roller head for a planetary rolling mill

Rolling mill for reducing the thickness of the wall of a tube

Rotary apparatus for removing a habitual tendency of an electric

Self-compensating die

Shear forming apparatus for elongated non-rotating metal tubes

Skew rolling mill

Skew rolling mill

Skew rolling mill for reducing solid and hollow cross-sections