No. 3B Jigmil for precision boring and milling without use of jigs; incorporated in design is form of electric automatic control that by operation of push buttons gives degree of precision beyond that possible merely by operational skill.
Devlieg Jigmil
Automobile Engr
Automobile Engineer ; 37 , n 486
1947
3 pages
Aufsatz (Zeitschrift)
Englisch
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