in which work is subjected to permanent internal twisting, e.g. for producing reinforcement bars for concrete

Full Title

Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills > in which work is subjected to permanent internal twisting, e.g. for producing reinforcement bars for concrete

Classification Context

Section:

PERFORMING OPERATIONS; TRANSPORTING

Class:

MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL

Subclass:

ROLLING OF METAL