Aircraft woods
I think the reference was to 'Aircraft Spruce and Specialty Co.', a go-to vendor for a whole lot of the bits and pieces that go into flying machines.
I've used aircraft grade spruce from AS&S to repair aircraft wings, and the wood is unbelievably gorgeous. The grain spacing and runout of wood used for certified aircraft is clearly defined in FAA-prepared 'adivsory circulars' and the best of the best is sold for repair/construction materials.
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