... easy to operate without electric power or pneumatic power.Ours spring balancer developed on the basis of international advanced technique, ... in other settled situation.AdvantageWe import the core part of spring balancer----coil spring from Korea(B&F engineering co,ltd, ... CHERY AUTOMOBILE CO.,LTD., CHINA NISSAN,CHINA FOTON, etc.Spring balancers together with ours spot welding transformer, spot welding ...