 | | B21B | Subclass index | METAL ROLLING IN GENERAL | | General methods or apparatus | 1/00, 11/00, 13/00, 15/00 | Control or handling | 35/00, 37/00, 38/00, 39/00, 41/00 | Safety, cooling, maintenance | 28/00, 33/00, 43/00 | Details of rolling mills | 27/00, 29/00, 31/00 | METAL ROLLING UNDER SPECIAL CONDITIONS | 9/00 | AUXILIARY OPERATIONS PERFORMED IN CONNECTION WITH METAL ROLLING | 15/00, 45/00, 47/00 | ROLLING SPECIAL ALLOYS | 3/00 | ROLLING TO PRODUCE PARTICULAR SHAPES | | Tubes | | rolling methods | 17/00 - 23/00 | mandrels, accessories | 25/00 | Extending closed shapes | 5/00 |
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