TriangleTrunkingTubeThistriangletrunkingtubeisaspeciallydesignedindoorcircuittube.Thecurrentplastictubesforcontainingelectricalwireinindoorcircuitarecommonroundtubes.Inordertoembedroundtubesinthewall,workershavetochiselthetrunkingsmanuallyinmostsituations,whichtakesalongtime.Insomecases,specialtrunkingcutterisused,
中国对外贸易：英文版
2008年1期
