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| специальная сталь; особая сталь; спецсталь | |||
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| особая сталь; специальная сталь | |||
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特殊 钢 : 12 phrases in 4 subjects |
| General | 8 |
| Metallurgy | 1 |
| Oil and gas technology | 1 |
| Technology | 2 |
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