Lub luag haujlwm ntawm cov menyuam yog txhawb nqa qhov hnyav ntawm txoj siv thauj khoom thiab cov khoom siv. Kev ua haujlwm ntawm cov menyuam yuav tsum yoog raws thiab ntseeg tau. Txo kev sib txhuam ntawm txoj siv thauj khoom thiab cov menyuam idler ua lub luag haujlwm tseem ceeb hauv lub neej ntawm txoj siv txoj siv thauj khoom, uas suav rau ntau dua 25% ntawm tag nrho cov nqi ntawm cov thauj khoom. Txawm hais tias cov menyuam yog ib feem me me ntawm txoj siv thauj khoom thiab cov qauv tsis nyuaj, nws tsis yooj yim los ua cov menyuam zoo.
Cov txheej txheem rau kev txiav txim siab qhov zoo ntawm cov menyuam muaj raws li hauv qab no:
Tus nqi radial khiav tawm ntawm cov menyuam; qhov yooj ntawm cov menyuam; tus nqi ntawm kev khiav tawm axial.
Kev siv thiab ua haujlwm ntawm cov menyuam:
1. Ua ntej siv cov menyuam, ua tib zoo tshuaj xyuas cov tsos mob rau qhov ua pob loj thiab puas. Cov menyuam sib tw yuav tsum tig hloov pauv yam tsis muaj teeb meem.
2. Qhov kev ncua deb ntawm cov menyuam yuav tsum txiav txim siab los ntawm kev tshawb fawb raws li hom kev thauj khoom thiab cov yam ntxwv ntawm tus thauj khoom, thiab zam kev teeb tsa ntau dhau lossis ntom.
3. Kev txhim kho cov menyuam yuav tsum raug yoog kom tsis txhob sib txhuam ntawm ib leeg.