... depression of pour point 倾点降低 depression tube 真空管 depressor 抑压者 ...
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vacuum valve , evacuated tube
The results show that the displacements of the procumbent circular tube under lateral impact are mainly local depression around the impact point and the global deformations can be neglected.
实验研究与数值模拟结果表明，砂垫平铺圆管的横向冲击变形主要为冲击点局部凹陷，结构的整体弯曲变形可以忽略。
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