1. Cov pob zeb diamond siab heev muab cov duab siab tshaj plaws thiab drilling ceev hauv txhua hom kev siv drilling.
2. Sintered txheej txheem cia cov khoom txiav tsis muaj dej thiab ua kom lub neej ntev dua.
3. Siv dej kom txias me ntsis thaum drilling tau pom zoo kom ntev lub neej yog tias cov khoom siv.
4. Haum rau Granite, marble, iav, pob zeb, thiab lwm yam.
5. Zoo tagnrho rau ob tus kws tshaj lij thiab cov neeg siv DIY.
