GH4169合金真空自耗重熔铸锭显微疏松的形成规律及熔速影响
GH4169합금진공자모중용주정현미소송적형성규률급용속영향
Formation Law of Microporosity in GH4169 Alloy Vacuum Arc Remelting Ingot and Influence of Melting Rate
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