表面锻打
Surface forging
以上为机器翻译结果,长、整句建议使用 人工翻译 。
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
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