The panel is very lightweight but structurally strong and can be selectively bent in one transverse direction if desired.

板件的重量非常轻，但结构很强，且如果需要的话，可沿一个横向方向对其有选择地进行弯曲。

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The flexual deformation of casing in a horizontal hole is caused not only by the uniform transverse load from dead weight, but also by the axial load, and the existence of initial bent if any.

水平井套管柱的挠曲变形，不仅受自重引起的横向均布载荷的影响，而且还受轴向力的影响，同时还可能有初弯曲。

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