WIAP Investigation reports
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Picture 1: Jim Widmer on the left, Sven Widmer on the right. Poldi PSI
Picture 3: Test parts are lowered into the bunker with the crane for measuring
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Picture 2. Thick concrete wall Poldi system
Picture 4: 3 components are measured, stress-relieved, MEMV vibriert, ungeglüht.
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