压力容器用钢板和锅炉汽包板20g,16Mng,15CrMog,12Cr1MoVg,低温容器板供货商,19Mng,22Mng,13MnNiCrMoNbg,20R.16MnR,15MnVR,15CrMoR,13MnNiMoNbR,15MnNbR,15MnVNR,16MnDR,09MnNiDR,15MnNiDR,12Cr2Mo1R,14