由于腐蚀一般都比较深，因此从表面上很难看出锻打工艺。另私人也难搞成分分析啊。

Because the cautery is deep usually, it's hard to see the forging handiwork from surface. In addition, personally, it's hard to do component analysis.

youdao

由于腐蚀一般都比较深，因此从表面上很难看出锻打工艺。另私人也难搞成分分析啊。

Because the cautery is deep usually, it's hard to see the forging handiwork from surface. In addition, personally, it's hard to do component analysis.

youdao