- 09
- Apr
dab tsi yog lub qe zoo li insulator siv rau?
lub qe zoo li insulator yog siv los ua kom cov hluav taws xob fence taut thiab ruaj ntseg,
no lub qe zoo li tus insulator yog siv nrog polywire, polyrope los yog strained hlau ntawm qhov kawg los yog fab ntawm lub laj kab hluav taws xob.