对生产数据进行分析，认为钢水成分、拉速和结晶器液面波动等是造成连铸坯表面纵裂的主要原因。
The composition of molten steel, cast speed and mould level changing are thought to be main reasons of causing surface longitudinal cracks by analyzing producing data.
论述在低压、差压铸造的生产过程中，液面加压控制系统对提高铸件致密度的重要作用。
The important role of liquid surface pressure control system on density of casting during die casting process and different process has been put forward.
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