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    which pencil is used in engineering drawing?

    0  Views: 719 Answers: 2 Posted: 13 years ago

    2 Answers

    http://archive.org/stream/engineeringdrawi019503mbp/engineeringdrawi019503mbp_djvu.txt


    it depends on he lines ....


    http://www.thealmightyguru.com/Pointless/PencilGrades.html


     

    Permanent Ink is what it used.



     



     



     



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