Raws li pom hauv daim duab sab xis, dome PDC thiab carbide inserts yog inlaid nyob rau hauv tib lub percussion me ntsis. Tom qab kev sim, cov carbide inserts yog hnav tawm.
Raws li pom hauv daim duab sab xis, dome PDC thiab carbide inserts yog inlaid nyob rau hauv tib lub percussion me ntsis. Tom qab kev sim, cov carbide inserts yog hnav tawm.