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| underlying metal; underlying metal (This coating is said to have high durability owing to the fact that both the underlying metal and the oxide coating have similar coefficients of expansion. 据说，这种涂层经久耐用，是因为基体金属与氧化物涂层的膨胀系数基本相同。) | |||
| parent metal | |||
| backing metal; base metal | |||
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| parent metal | |||
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| base metal | |||
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底层 金属 : 12 phrases in 4 subjects |
| Electronics | 2 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Technology | 8 |
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