dianxianlutaoguang
Hlau sheathing raj hlau ua tau kuj hu ua insulating raj. Nws yog ib yam tshiab ntawm cov raj nruab nrog uas yog cov khoom siv nrog insulating. Nws yog ib lub raj insulating uas ua los ntawm kev cob qhia raws li kev siv ntawm matrix thiab lwm cov ntaub ntawv txhawb. Nws yog siv coj los hnav lub xov hlau thiab tiv thaiv cov xov hlau. , Yog li nws hu ua xaim sheath.