GMW3399M-ST-S HR1200T/900Y-MS UNCOATED U ¥5.66 标准GMW3032M-ST-S CR210B0材料 UNCOATED U ¥5.66 SPFC340冷轧卷板JIS G3135标准SPFC340材料 ¥5.08 SPFC370冷轧卷板JIS G3135标准SPFC370材料 ¥5.08 SPFC390冷轧卷板JIS G3135标准SPFC390材料 ¥5.08 标准GMW3032M-ST-S CR240B0 UNCOATED U材料 ¥5.75