Cov nplooj ntawm lub tshuab slitting kuv saws ntawm ib tug rau cov menyuam, thiab cov ntsia hlau ntawm ib qho kawg ntawm daim npav cob qhia tuaj yeem raug tshem tawm, thiab rab riam tuaj yeem ua rau ntawm qhov ntawd.
1. Ua ntej nres lub cav loj, nias lub pob qij nres kom paub tseeb tias lub cav loj yog nyob hauv lub xeev qub, thiab mam li muab cov khoom siv twj txiav mus rau theem nrab hloov chaw.
2. Siv lub qhov ncauj qhov ntswg kom tig cov txiv ntsej muag rau ntawm qhov kawg ntawm lub puab tsaig kom txav mus rau ntawm qhov chaw qis qis, thiab saib seb qhov txiav tawm ntawm cov hniav yog qhov tsim nyog (feem ntau txiav mus rau 0.5-1 hli). Yog hais tias lub riam ntug yog nyob rau hauv kev sib cuag nrog tsuas yog ib qho kawg ntawm cov hniav, nws yuav daws tau los ntawm kho lub eccentric ncej qab lub thav duab tseem ceeb.
