... guide bar nose:WS bar nose,ST bar nose,OR bar nose,DLD bar nose,SV bar nose,GB bar nose(GB375),harvester bar noseHangzhou Longer saw chain ... from America, which shares the same origin of materials with OREGON. And the type of the materials is SAE8660. Heat ... components. These inspections include test for pre-tensile strength, test for stability and breaking, test for the hardness of its components, ...