Based on formula of loop stiffness for plastic piping, calculating chart was drawn which showed inherent features of plastic piping.
根据塑料管材环刚度计算公式绘编成计算图，该图显示出塑料管材的固有特性。
Based on formula of loop stiffness for plastic piping, calculating chart was drawn which showed inherent features of plastic piping.
根据塑料管材环刚度计算公式绘编成计算图，该图显示出塑料管材的固有特性。
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