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美工刀sk2和sk5区别 sk2与sk5刀片区别?美工刀片啥材质? 1、成分不同sk2:碳C,1.15-1.25,硅Si,0.10-0.35,锰Mn,0.1...
2022-05-19 15:27:24 工具 sk5 sk2 硬度 C