• TECHKNOW
  • TECHKNOW

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    Naša web stranica koristi kolačiće i druge tehnologije kako bi osigurali najbolje iskustvo pretraživanja.

    Postavke kolačića možete u bilo kom trenutku promeniti.

    Saznajte više o tome kako koristimo kolačiće.
    Deep holes are defined by a ratio between the hole depth and the hole diameter.
    Deep hole ratio depths are more than 10x the diameter and up to 150x the diameter ratio.
    There are 3 types of deep drilling methods:
    Gundrills
    STS (Single tube system)
    DTS (Double tube system)

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