Yuav ua li cas siv kev nyab xeeb pob zeb txiav tshuab, ua ntej nkag siab, yuav tsum txawj siv cov txuj ci kev ua haujlwm uas tsim nyog, kom tuaj yeem ua haujlwm ntau dua du.
Xaiv cov khaub ncaws ua haujlwm ua haujlwm yog qhov tseem ceeb heev, tshwj xeeb tshaj yog rau plua plav kaus mom thiab lub ntsej muag yog qhov tseem ceeb, tshwj xeeb tshaj yog rau cov poj niam ua haujlwm, yuav tsum sib phim nrog lub hau ntim ua haujlwm, thiab rau lub hwj huam hloov chaw, hauv kev hloov kho, yuav tsum muaj kev yoog thiab yooj yim dua.
Qhov tseeb, hauv cov txheej txheem ntawm kev ua haujlwm, peb yuav tsum them sai sai kho qhov tseeb ntawm kev txiav, seb puas yog cov workpieces me me, lossis cov workpieces loj, zoo ib yam, tom qab tag nrho, hauv kev siv lub tshuab txiav pob zeb, yuav tsum nyob hauv qhov chaw.
