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Thread: Vintage tunnel boring machine - GIF

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    Jon
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    Vintage tunnel boring machine - GIF

    Vintage tunnel boring machine.




    Similar concept, but in nature:




    Previously:

    http://www.homemadetools.net/forum/l...825#post137094
    http://www.homemadetools.net/forum/t...545#post128137
    http://www.homemadetools.net/forum/c...031#post120283
    http://www.homemadetools.net/forum/t...7790#post86258


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