So it is significant for improving casting quality and social productivity of labor to study fast testing system of green sand composition and performance parameter.
因此，研究湿型砂组分及性能参数快速测试系统对于提高铸件质量和劳动生产率具有非常重要的现实意义。
So it is significant for improving casting quality and social productivity of labor to study fast testing system of green sand composition and performance parameter.
因此，研究湿型砂组分及性能参数快速测试系统对于提高铸件质量和劳动生产率具有非常重要的现实意义。
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