chang yong heng seng co., ltd. is a trusted supplier of industrial tools and hardware equipment in chiang mai and lamphun, serving factories, industrial technicians, plumbers, machinists, welders, metal fabricators, carpenters, and construction professionals. we provide a complete range of workshop tools

construction steel & metal products in nakhon si thammarat construction steel: round bars (rb6–rb34, tis 20-2543), deformed bars (db10–db40, tis 24-2548). reinforcement supplies: prefabricated stirrups (column/beam), footings, binding wire, and wire mesh. steel pipes &amp