Indexed in Engineering Index 1942 p 623, from various sources. (see also Can Aviation v 15 n 12 Dec 1942 p 130, 132, 134, 136, 138)
Removing broken drills
Steel
Steel ; 112 , n 8
1943
Aufsatz (Zeitschrift)
Englisch
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Removal of broken drills, reamers, plug gauges from drilled holes
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