poly poly insulator tsis yog tsuas yog siv rau poly hlau, tseem tuaj yeem siv rau hlau hlau, qee qhov insulators tuaj yeem siv rau poly hlau, poly hlua thiab poly kab xev ua ke.

Yog tias peb npe hluav taws xob laj kab hluav taws xob raws li daim ntawv thov, peb tuaj yeem faib cov hluav taws xob laj kab hluav taws xob ua cov hlua hluav taws xob poly, cov hlua hluav taws xob poly insulators thiab poly daim kab xev insulator. cov poly hlau insulators muaj lub nplhaib insulator, cov khoom siv hluav taws xob insulator, offset insulator, pigtail insulator, thiab lwm yam.