Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
Load children
B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Load children
B21J
FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
Load children
B21J15/16
Drives for riveting machines; Transmission means therefor
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B21J15/22
operated by both hydraulic or liquid pressure and gas pressure
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