Lorentz contraction perhaps? Maybe the extrusion line was travelling at 32% of the speed of light that day it was made?
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Bill Pendergrass
RV-7A: Flying since April 15, 2012. 690hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda' My RV Construction Page