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S.A. Block & Concrete (Proprietary) Limited

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  • Alberton, ZA
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  • Information Patent Grant

    Drainage device for particulate material
    • Patent number 4,110,214
    • Issue date Aug 29, 1978
    • S.A. Block & Concrete (Proprietary) Limited
    • Johann B. Pfeffer
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

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