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超因瓦合金
释义
超因瓦合金
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精密合金
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super invar alloys
超因瓦合金
含镍31%、钴5%、余量为铁的低膨胀合金。
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Petrie
Petrified Forest National Park
petrified wood
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Petri net language
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更新时间:2026/6/10 8:12:22