奥国弹簧钢高弹力SK5弹簧钢全硬发蓝弹簧钢：A903 S500 S600 S709 S790 S705 S390PM S590PM S690PM M201 M202 M238 M261 M310 M238ESR W300 M330 M340 M461 W302 W303 W304 W321 W500 K100 K105 K110 K305 K340 K460 K600 K720 K990 VMRM300ESRM310ESR N100 N320 N540 N350 E116 E200 E220 E230 E400 F300 F530 V320 V155 V800 V820