Tricone bit ayaa si weyn loogu isticmaalaa qodista rotary, inta badan waxaa loo isticmaalaa in lagu qodo godadka waaweyn iyo godadka wax soo saarka ee meelaha dhagaxyada waaweyn, miinooyinka godad furan, soo saarista batroolka, iyo goobo kale.Waxaa jira laba kooxood oo qodis wareeg ah oo waaweyn: (1) burburinta rotary by load-point high-loading to rock from three cones, iyo ...
Akhri wax dheeraad ah