pre-erection
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布鲁斯表示主要高速钢粉末冶金过程是：加入了预合金化冶炼高速钢成分粉末，经过感应炉熔化，然后气体喷雾造粒制作而成。
Bruce said the main high-speed steel powder metallurgy process: Add a pre-alloyed powder metallurgical high speed steel components, induction-melting furnace, and then made the gas spray granulation.
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