Cov lus piav qhia luv luv:

Cov yam ntxwv khoom: brand tshiab thev naus laus zis, zoo nws tus kheej-ntse, ntse sib tsoo, siab kub kuj, siab hardness, siab ua hauj lwm thiab tsis yooj yim hnav, zoo pob zeb diamond thiab xuab zeb, ua hauj lwm zoo, kev nyab xeeb thiab kev tiv thaiv ib puag ncig, du incision tsis muaj chipping thiab lwm yam zoo Cov.

Cov khoom lag luam yog qhov tsim nyog rau: txhua hom hlau thiab cov ntaub ntawv tsis yog hlau, sib tsoo tungsten steel, milling txiav, alloys, pob zeb diamond, iav, ceramics, cov khoom siv semiconductor (silicon carbide, thiab lwm yam), cov ntaub ntawv sib nqus (sib nqus cores, cov ntawv sib nqus, ferrites, thiab lwm yam) thiab cov khoom siv hlau (cov tawv tawv tawv, tungsten steel YG8, thiab lwm yam)