B. in a later chapter, hollow plate the smallest bending radius is 175 times of its thickness, can only cold bending, hot bending.
在后面章节中，中空板的最小弯曲半径是其厚度的175倍，只可以冷弯，不能热弯。
Characteristics: high flexibility of small bending radius corrosion resistance strong halogen specifications b: rib loose, so that the hose can withstand greater pressure, and maintain flexibility.
特性：柔韧性高弯曲半径小耐腐蚀力强不含卤素规格b：肋宽大，使软管能承受更大压力，并保持柔韧性。
The bending stress is zero for the element at b.
在B处的单元体，弯曲应力为零。
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