GB/T 15620
GB/T 15620 (Solid wire electrodes, solid strip electrodes, solid wires and solid rods for fusion welding of nickel and nickel alloys)· GB (Cina) · 90 materiali
GB/T 15620 (Solid wire electrodes, solid strip electrodes, solid wires and solid rods for fusion welding of nickel and nickel alloys)· GB (Cina) · 90 materiali