Ma Tricone Drill Bits amagwiritsidwa ntchito kwambiri mumakampani obowola zitsime mukayenera kudutsa m'miyala yofewa komanso yolimba.
Chifukwa cha kugwedezeka, kuphwanya ndi kudula miyala pamene roller cone ikuzungulira, kukhudzana kuli pakati pa cone ndipo dzenje la pansi ndi laling'ono, kupanikizika kwapadera kumakhala kwakukulu, mphamvu yogwirira ntchito ndi yaying'ono ndipo tsamba logwirira ntchito lili ndi kutalika kwakukulu ndipo lingakhale loyenera miyala yamitundu yosiyanasiyana.
Nthawi yotumizira: Julayi-25-2022