Boorpunt: Verskil tussen weergawes
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Lyn 15:
== Eksterne skakels ==
{{Commons-kategorie inlyn|Drill bits}}
* {{en}} [https://web.archive.org/web/20051230001027/http://www.mfg.mtu.edu/marc/primers/drilling/nomen.html Nomenklatuur]
{{Saadjie}}
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