SP SPP(鍍硬鉻產(chǎn)品電鍍厚度t 33μm)
SUJ2
HR HRC 58
g6 h5
6×2,8×3,10×4,12×6,13×7,16×10,20×14,25×16,30×17,35×19,40×20,50×26
蓉公網(wǎng)安備 51012402000290號