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| More topics under "B21 - Mechanical metal-working without essentially removing material; Punching metal" (336,946) |
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| B21B - Rolling of metal (70,880) | | B21C - Manufacture of metal sheets, wire, rods, tubes, profiles or like semi-manufactured products otherwise than by rolling; Auxiliary operations used in connection with metal-working without essentially removing material (41,619) | | B21D - Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing material; Punching (156,484) | | B21F - Working or processing of wire (17,933) | | B21G - Making needles, pins, or nails (1,332) | | B21H - Making particular metal objects by rolling, e.g. screws, wheels, rings, barrels, balls (7,328) | | B21J - Forging; Hammering; Pressing; Riveting; Forge furnaces (25,228) | | B21K - Making forged or pressed products, e.g. horse-shoes, rivets, bolts, wheels (14,250) | | B21L - Making chains (1,892) |
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