采用自制脉冲恒流电源，研究了缝纫机零部件（2A12）在低硫酸浓度下的脉冲恒流硬质阳极氧化工艺。
The hardened anodic oxidation coating on sewing machine components(2A12)was investigated in different sulfuric acid density solutions with special apparatus.
采用自制脉冲恒流电源，研究了缝纫机零部件（2A12）在低硫酸浓度下的脉冲恒流硬质阳极氧化工艺。
The hardened anodic oxidation coating on sewing machine components(2A12)was investigated in different sulfuric acid density solutions with special apparatus.
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