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    Re: Az, Z, Zc and Zn - which one is what? How to use them properly?
    From: Geoffrey Kolbe
    Date: 2017 Apr 16, 23:13 -0700

    Unless you are trying to pass an exam, the 'proper' definition does not really matter does it? So long as you fully understand what YOU mean by the symbols you use, then "how to use them properly" should not be a problem. The important thing is to understand the principles.

    Geoffrey Kolbe

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