The BTA (Boring & Trepanning Association) System e ile ea hlahisoa haholo ke sehlopha sa machaba sa baetsi ba lisebelisoa.Sistimi ena e bile e 'ngoe ea litsamaiso tsa pele tse atlehileng tsa lisebelisoa tsa ka hare tsa ho tlosa chip,' me e kenyelletsa ho phunya, ho tena, le hlooho e hlabang 'me e nkuoa e le sistimi e ntle ka ho fetisisa mosebetsing oa ho etsa mekoti o sebelisang lisebelisoa tse pholisang khatello e phahameng.
Ts'ebetsong ea ho etsa masoba a BTA, mokelikeli o tlas'a khatello o phalla ho ea moeling oa OD ea bar le hlooho, 'me o ntša metsi ka li-chips ka ID ea bar e tenang.Mokelikeli o hloekileng o hloekisitsoeng o phalla kamehla ka ntle ho hlooho, kahoo o tlotsa lipampiri tsa tataiso tse sebetsang e le sesebelisoa se tukang ho hlahisa qetello e boreleli, le e khonang ho fepa ka tekanyo e phahameng.Botebo ba lesoba bo fumaneha ho fihla ho li-diameter tse 150 kapa ho feta.
1. Boleng bo phahameng le theko ea tlhōlisano
2. Ho fana ka thepa ka nako
Hlooho ena ea boro ea BTA e sebelisa lehare la ho roala le tsoang kantle ho naha, e na le monyetla oa ho sebetsa hantle haholo, ho fetola lehare habonolo, bophelo bo bolelele ba ts'ebeletso, litšenyehelo tse tlase tsa tšebeliso.'Me e ka cheka holim'a tšepe ea carbon, tšepe ea alloy e matla haholo, tšepe e sa hloekang joalo-joalo.ho nepahala ha lesoba bophara IT9-11.Bokhopo ba sefahleho: Ra6.3-12.5