... and barrel, according to zoning are: Tension tower, straight-line tower, corner tower, for Bit towers (location of towers to ... etc., a few pieces of steel welded into an assembly, so hot-dip galvanizing corrosion, transport and construction, set up is very ... controlled angle production lines, 1 numerical bending machine, 2 automatic connecting-plate machines, 2 digital controlled flame cutters, 80 ...