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B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
B23K1/00—Soldering, e.g. brazing, or unsoldering
B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
FR945591D1947-04-231947-04-23
Improvements in drilling holes with flats
ExpiredFR945591A
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