Fig. 2—Drum head ni/in)iiitgn made from duralu-min DURALUMIN Automotive hidiistries AuyKst 2i, 1022 … Fij.S Figs. 3, 4 and 5—Mifioijiupki showing physical structure of duralumin material the latter must be annealed. Moreover, if con-siderable work must be done on it the material will, likebrass, require annealing between successive operations.For such shapes as can be produced by a single…
Automobiles · Aeronautics
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