Model the spherical valve case with characteristic parameter which is the caliber of the valve, and according to some standards determine other structure sizes and create the data file.
以阀门的口径为特征参数，根据标准确定阀体的其他结构尺寸，并建立数据文件。
Model the spherical valve case with characteristic parameter which is the caliber of the valve, and according to some standards determine other structure sizes and create the data file.
以阀门的口径为特征参数，根据标准确定阀体的其他结构尺寸，并建立数据文件。
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