"AUTOMATIC CHINA WELDING MACHINES adopt the advanced technology from GERMANY and make great improvements in the electrical control units.Use the OMRON rotary encoder and PLC to protect and automatic control of the complete chain welding process and movements.Is the best choice for the heavy loading chain production,the welding quality can arrive 80 grade.Also can use for the welding of anti-skid chain;binding chain;mine chain and other kind of round link chains.