... single-edge, two-edge, four-edge and bowtie shear blade configurations. The margin is smooth , and the ... company can produce each kind of circular shear blades within diameter 1.5m as well as ... the superelevation precision circular shear blades within diameters 0.5m, the parallelism ... 2)Segment Welding Methods:Laser,High frequncy,Hot press,Cold press 3) Base Body Materail: 9CrSi,Steel,or ...