Maxaad u doorataa Grand inuu noqdo alaab-qeybiyaha Shiineeska ah ee tuubooyinka feeraha saddex-koor, PDC, reamers HDD iyo in ka badan
Marka la raadinayo sahayda warshadaha saliidda iyo gaaska, helitaanka alaab-qeybiyeyaal la isku halayn karo oo kharash-ool ah waa muhiim. Sida mid ka mid ah soosaarayaasha iyo alaab-qeybiyeyaasha hormuudka ka ah Shiinaha, Grand waxay bixisaa badeecooyin badan oo kala duwan, oo ay ku jiraan tri-cone bits, feeraha PDC, ream HDD ...
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