Demand for training in aircraft welding has evolved comprehensive course, including every essential of process. (See also Int. Acetylene Assn. -- Proc. of mtg Nov. 13-15, 1929 pp. 80-85)
Training of welder mechanics by universal air lines
Acetylene Jl.
Acetylene Journal ; 31 , n 6
1929
2 pages
Aufsatz (Zeitschrift)
Englisch
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