Kev lag luam pob zeb thoob ntiaj teb cov neeg ntseeg hais tias qhov zoo ntawm Tuam Tshoj cov khoom lag luam zeb tiav tsis siab, vim hais tias cov khoom siv ua zeb ua thiab cov cuab yeej thev naus laus zis tau siv tom qab lwm lub tebchaws. Noj cov khoom tiav ntawm granite tiav cov vuas ua piv txwv. Feem ntau ntawm cov granite pov tseg txiav los ntawm cov mine yog qhov tsis xwm yeem thiab qhov loj me sib txawv, qhov loj me-txiav cov pob zeb granite feem ntau yog siv nrog diameters ntawm 1m thiab 1.6m pob zeb diamond puag ncig pom tuaj, pom hniav zoo tsis yog siab, saw pom cov phaj yog feem ntau polished thiab polished nrog rocker caj npab, kev ua haujlwm yog feem ntau rau kev siv tshuab ua haujlwm, uas yog, siv cov kev ua haujlwm siab ntawm kev siv lub tshuab ua kom sib tsoo.
Qhov zoo ntawm cov abrasiveused siv nyob rau hauv kev txhawb kev sib tsoo lub taub hau yog qhov tsis zoo, thiab daim ntawv polished yog txiav rau hauv qhov loj me me nrog lub tshuab txiav ntoo ib txwm pom, thiab cov txheej txheem ntau lawm yog qis dag ntawm qib qis ntawm automation. Thaum xyoo 1990, ntau lub tebchaws nyob teb chaws Europe tau tsim cov tshuab txiav cov khoom zoo thiab cov khoom ua tau zoo siab pom tuaj. Kev tsim cov granite finish vuas yog yuav luag tag nrho cov tshuab.
