Welding Samples Special Samples Refrigeration Compressor Low Voltage Electrical Home Applaince Hardware Harness Sample Auto Parts Butt Welding Carbon Steel Aluminum Stainless Steel Spot welding sample of bridge terminal connection wire Spot welding sample of copper sheet and copper wire Terminal wire spot welding sample Spot welding sample of four-point wire row Spot welding samples of low-voltage electrical appliance terminal wires T046 package projection welding sample Aluminum row butt welding sample 2x5mm high carbon steel bar butt welding sample 3mm galvanized square tube butt welding sample 4mm carbon steel rectangular square tube butt welding sample 20mm copper rod butt welding sample 5X100mm iron plate butt welding sample 45# steel butt welding sample Aluminum alloy motorcycle wheel rim flash butt welding sample Aluminum alloy wheel hub butt welding sample Aluminum plate flash butt welding sample