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  • Users: Chadd
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  1. Chadd

    Kneas Bar Testing

    The Kneas Bar was started by a U Penn Engineer named Frank Kneas as I understand circa 1962. I am far from certain on the details but will attest after hundreds of tests in the field, I conformed in is within 10% of high profduction drill rig blow count results with the 130# hammer provided you...

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