Highway Sound Barrier Mesh Welding Machine The HW-AM1350H is a 1350mm galvanized panel welding machine for highway sound barrier and guard mesh built for American road infrastructure contractors and noise barrier suppliers working on state DOT projects. It combines a rigid stress-relieved frame, a 160 kVA medium frequency DC welding transformer and a PLC touchscreen HMI, so a single operator can hold consistent nugget strength across a full shift. Why Buyers in the Americas