Raws li ib qho ntawm cov kws tshaj lij lub ntiaj teb tiv thaiv tester tuam ntxhab thiab cov muag khoom hauv Suav teb, peb tau tshwj xeeb los ntawm cov khoom zoo thiab cov nqi sib tw. Thov so assured mus yuav pheej yig earth resistance tester ua nyob rau hauv Suav teb nov los ntawm peb lub hoobkas.
Nrhiav