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SEM-EDS from FG-3 inner sock. (a, b) Cut bundle of fiberglass wrapped in synthetic fibers. (c) One fiberglass fiber and two synthetic fibers with characteristic bright regions. (d) EDS acquired from fiberglass region marked in (c) showing Si, Al, and Ca. (e) EDS from bright spot in synthetic fiber marked in (c) exhibiting Cl and Sb.
