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| 弗思防焊接腐蚀不锈钢含有钦 | |||
| F.D.P. 含钛奥氏体不锈钢 (可防止焊接接头晶间腐蚀) | |||
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Firths decay proof stainless steel : 4 phrases in 1 subject |
| Metallurgy | 4 |
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