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Figure 6: Sheet metal layout
Airman Knowledge Testing Supplement for Aviation Maintenance Technician – General, Airframe, and Powerplant; and Parachute RiggerOfficial PDF AMA

Practice
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2" 0.064 90° 3/16" R 1" 1½" A A B C B C D Setback = R + T Bend allowance = 2π (R + ½T) 4