Lub nres tuaj yeem tswj tau qhov kev ua haujlwm pub dawb lossis kev sib tsoo tam sim ntawm lub zog sib hloov los ntawm electromagnetic, hydraulic, pneumatic thiab lwm yam txhais tau tias;
Raws li qhov chaw tswj tau muab faib ua: electromagnetic nres, hydraulic nres, pneumatic nres, thiab lwm yam .; Raws li cov qauv yuav muab faib ua: disc nres, disc nres, log nres, thiab lwm yam .;
Raws li kev ua haujlwm hom, nws tuaj yeem muab faib ua feem ntau qhib nres (hauv lub xeev ib txwm sib cais) thiab ib txwm kaw nres (hauv lub xeev ntawm kev sib tsoo)
