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  1. 09-06-2014 #10
    teecee
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    Super Moderator Horse Of The Year teecee has a spectacular aura about teecee's Avatar
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    Tony Cahill
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    Quote Originally Posted by trish View Post
    http://www.harnesslink.com/USA/India...w-cobalt-rules

    Good read.
    Any one know how much 25 parts per billion (ppb) is??

    http://www.rapidtables.com/convert/n...ppm-to-ppb.htm


    http://www.endmemo.com/sconvert/mg_lppb.php
    Last edited by teecee; 09-06-2014 at 07:24 PM.
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