Vim tias hluav taws xob rauj laum me ntsis tsis yog ntse, nws yog drilled los ntawm kev quab yuam, thiab lub nro ntawm cov hlau zoo heev. Qhov kev hloov quab yuam tsis ua haujlwm zoo rau nws. Tsuas yog lub laum me ntsis yuav tau txiav rau hauv. Lub kaum sab xis ntawm lub laum me ntsis tsis yog. Lub ntsis zoo tib yam laum me ntsis Lub kaum sab xis pem hauv ntej yog lub kaum sab xis, thiab pem hauv ntej ces kaum ntawm qhov cuam tshuam yog lub kaum sab xis tsis zoo, yog li lub laum tsis nkag.
Kev siv hluav taws xob rauj siv tau rau qhov drilling qhov hauv pob zeb ua, pob zeb, pobzeb, marble thiab lwm yam ntaub ntawv. "Hluav taws xob rauj" tsav cov hlau tsoo nrog kev cuam tshuam kev siv, siv rau kev sib tsoo, qhib qhov loj lossis tsoo ntawm cov pob zeb ntawm kev ua vaj tse, av ci thiab lwm yam ntaub ntawv.
