Ib lub voj voog hlau siv rau kev sib txuas insulated overhangs
feem ntau yog siv rau hauv cov khoom siv hluav taws xob
Ib qho txuas rau kho cov xov hlau puas los kho lawv cov hluav taws xob thiab cov khoom siv kho tshuab
Lub connector siv los txuas cov xov hlau thiab tswj lawv cov hluav taws xob thiab cov khoom siv kho tshuab