采用热风冲天炉-工频炉双联熔炼，气压保温浇包浇注。
The iron is melted with cupola- mainfrequency furnace duplex process, and pouring was conducted with pneumatic insulated pouring ladle.
采用热风冲天炉-工频炉双联熔炼，气压保温浇包浇注。
The iron is melted with cupola- mainfrequency furnace duplex process, and pouring was conducted with pneumatic insulated pouring ladle.
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