环刚度，是压力管道的承受的负载有内部压力和外部压力。无压管道承受外压负载。
ring-stiffness环刚度 The results showed that superfine glass bead treated by an organic agent could improve a drop hammer impact and ring-sti...
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本发明具有结构合理、节省原料、熔 胶焊接牢固、环刚度高等优点。
The pipeline has the advantages of reasonable structure, saving materials, solid welding by the melt adhesive, high ring stiffness, etc.
加强钢带的厚度与宽度根据管材直径、环刚度要求不同而分别设计确定。
The thickness and breadth of the steel strip is determined according to different pipe diameter and ring stiffness class requirements.
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.
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