... ,stage truss ,exhibition truss, lighting truss,project truss,circular truss,two side corner ,exhibition truss system ,gentry truss ,lift truss ... ,folding truss ,bolt truss ,layer truss , speaker truss ,spigot truss1.ALUMINUM STAGE TRUSSTriangle truss & square ... celebration and so on. 2.ALUMINUM STAGE TRUSS 1.>Lighting truss/tower truss/stage truss adopt 6082-T6 which is ...