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that these waste pieces were not later put to some use, this has not been demonstrated irrefutably). On the other hand the trihedral apex is the raw material used for the manufacture of microliths, such as backed edge blades. Usually the trihedral apex is subjected to the technique again until another flection yields another two pieces, known as the distal microburin (another characteristic waste product) and the central part of the worked piece that possesses a double trihedral apex, with converging fracture lines.This double trihedral apex

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