Lub tshuab no thauj thiab tshem cov khoom ua haujlwm ntawm nws tus kheej, nws ua tiav kev tuav, tuav thiab xa cov khoom ua haujlwm. Kev ua haujlwm raug zoo heev, tshem tawm cov yuam kev ntawm tes thiab ua kom cov khoom ua haujlwm zoo tas li.
Nws siv tau nrog cov tshuab lathes, milling machines thiab lwm yam cuab yeej siv tshuab. Yooj yim rau nruab thiab sib txuas sai rau cov kab ntau lawm uas twb muaj lawm. Cov qauv khov kho ua rau kev ua haujlwm ruaj khov tsis tu ncua nrog qhov tsis ua haujlwm tsawg.
Kev hloov cov haujlwm tes ua ntau zaus ua rau txo cov nqi zog ua haujlwm, ua kom cov khoom tsim tau sai dua thiab ua rau cov khoom tsim tau ntau dua. Nws pab cov tuam txhab lag luam kom paub txog kev txhim kho ntse thiab kev txhim kho cov nqi kom zoo.