Below is a forced translation:

>>....the Ehrhardt pressing process using special steel is particularly suitable for the manufacture of hunting and military rifle barrels. After the ingot is pierced, the barrels are given several passes, pass through a conical rolling mill and are ground to exact calibre. In the conical rolling mill, the cylindrical barrels are not only given a tapering shape, but the shell material is also spiralled along its longitudinal axis......<<

Cheers,

Raimey
rse