... , electricity drive wheel counter- mine trolley, mineral product automobile, excavator, car loader, bulldozer, each kind of hoist crane, coal mine hydraulic ... .12Mn,15MnVN,16Mn,15MnVGB1591Q295(A,B),Q345(A,B,C,D,E)GB1591SM520(B,C),SM570JISG3106St44-3,St37-2,St52-3,St50-2DIN17100St60-2,St70 ...