The article discusses causes and eliminated measures of aluminium alloy die forgings crassitude crystal from four sides of component, technical parameter, temper of die and heat treatment.
从锻件的材质、锻造工艺参数、锻模温度、热处理工艺参数四个方面，阐述了铝合金模锻件粗晶缺陷的产生原因及消除措施。
Results: umbilical cord mild infection rate is related with the cut of umbilical cord with residual, the high ligation of the umbilical cord and the umbilical cord with congenital crassitude.
结果：脐带轻度感染率与脐带残留未剪净、脐带高位结扎、脐带先天粗大密切相关。
Results: umbilical cord mild infection rate is related with the cut of umbilical cord with residual, the high ligation of the umbilical cord and the umbilical cord with congenital crassitude.
结果：脐带轻度感染率与脐带残留未剪净、脐带高位结扎、脐带先天粗大密切相关。
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