Shingfong pvc trunking ndi yapamwamba kwambiri, ili ndi mitundu yosiyanasiyana ya pvc duct, kukula kwake ndi makulidwe osiyanasiyana a 200, titha kupereka mtundu wamtundu wa pvc trunking. Kuti zikhale zosavuta kukhazikitsa pvc duct, nthawi zambiri timayika tepi yomatira yapawiri kumbuyo kwa pvc trunking. Msika wosiyana uli ndi mtundu wake wogulitsa wotentha wa pvc trunking wokhala ndi zomatira. Mwachitsanzo, msika wina umakonda pvc trunking m'makatoni atanyamula, okhala ndi zomatira zamtundu wobiriwira, ena amakonda pvc trunking zomatira zakuda zofiira. Tili ndi tepi yomatira yapamwamba kwambiri yoti tipereke.