B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/97
B23K 11/00 (2006.01) B23K 9/035 (2006.01)
Patent
CA 1122282
File No. 915,023 ABSTRACT A double grooved, preferably ceramic, welding backup is provided. The welding backup has a generally planar working face with parallel grooves, the grooves being separated by a central ridge, there being substan- tially flat lands at the sides of the grooves.
329164
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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