1) me me thiab lub teeb yuag, lub zog - txuag thiab ib puag ncig tus phooj ywg;
2) Cov khoom siv zoo thiab tshuaj lom neeg ruaj khov, muaj peev xwm nqa tam sim no;
3) me me, hnyav dua, thiab tus nqi qis dua lwm cov cables zoo sib xws;
4) Zoo corrosion kuj, kub tsis kam, acid thiab alkali tsis kam, hnav tsis kam, tsis cuam tshuam los ntawm ya raws, shielded nyob rau hauv corrosive ib puag ncig, zoo anti- laus zog, thiab ntev kev pab cuam lub neej;
5) Cov nqi qis, tsim nyog siv rau hauv ib puag ncig nrog cov dej phwj tuaj, dej nag, hluav taws xob ultraviolet, lossis lwm yam kev tawm tsam hnyav xws li acids thiab alkalis.