Diamond Twist Coated Drill Bit Gushiraho ibice 5

Ibisobanuro bigufi:

Ibisobanuro bigufi:

1. Nibyiza kubacura, amasaro, ikirahure nibindi bikoresho byimitako
2. Bikozwe mu cyiciro cyo hejuru cyo hejuru; Hagati-nziza ya grian diyama
3. Harimo imyitozo 5
4. 45 ° Gukora inyuma ya chip yo gukuraho groove