Using the steel ball production line can develop medium and small size equal angle steel. It is with less investment and fast result by technology improvement.
利用钢球料生产线,开发中小型号等边角钢,进行工艺改进,投资少、见效快。
The equivalence between theorem of equal angle of view and reversible property of low pair, applied in synthesis of plane four-bar linkage, is demonstrated to reveal essence of their relation.