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Petur Bjarni: Welding pressure shaft
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Petur Bjarni: Water tunnel in hydropowerplant Kárahnjúkar
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Petur Bjarni: Preparing before concrete
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Petur Bjarni: Water tunnel
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Petur Bjarni: Kárahnjúkar powerplant
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Petur Bjarni: Generator house
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Petur Bjarni: Construction time in Kárahnjúkar