Lub nro tester yog siv los ntsuam xyuas cov viscosity ntawm raw cov ntaub ntawv nplaum, nws cia li xam lub siab tshaj plaws quab yuam thiab siab tshaj plaws quab yuam deformation.

Thermal penetration tester yog ib qho kev ntsuam xyuas rau lub thermal penetration resistance ntawm peb lub ntsej muag ntaub thaiv npog ntawm vuam kaus mom hlau, kuaj seb cov khoom puas pervious rau lub teeb los yog ignited, kom paub qhov zoo ntawm cov khoom siv.