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| osmiridium alloy (17~48Os, 49Ir,余量 Pt、Ru、Rh) | |||
| osmiridium (40Ir, 17~45Os,少量 Ru,白金,Rh) | |||
| osmiridium alloy | |||
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锇铱合 金 : 4 phrases in 2 subjects |
| Metallurgy | 1 |
| Technology | 3 |
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