Isikhongozeli sihlala senziwa kwizinto eziphezulu eziphezulu ezifana ne-polyturethane foam okanye iipaneli ezixineneyo zokunciphisa i-isvlom i-leced.com yenziwa kwi-aluminium okanye intsimbi engenasimo ngenxa yobushushu obuphantsi.
Yenzelwe ngokukodwa iisampulu zebhayoloji ekufuneka zigcinwe rhoqo, uthotho logcino oluphambeneyo yitanki encinci ye-nitrogen.
