TREA

Proehl; Norman P.

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  • Lake Forest, IL, US
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  • Information Patent Grant

    Dredge cutter head
    • Patent number 4,050,170
    • Issue date Sep 27, 1977
    • Proehl; Norman P.
    • Norman P. Proehl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

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