Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21B
ROLLING OF METAL
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45/00
Devices for surface; or other; treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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B21B45/02
for lubricating, cooling, or cleaning
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B21B45/0209
Cooling devices, e.g. using gaseous coolants
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B21B2045/0212
using gaseous coolants
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