横截面是圆形
The cross-section is circular
以上为机器翻译结果，长、整句建议使用 人工翻译 。
圆柱是具有圆形横截面的棱柱。
A cylinder is a prism with a circular cross section.
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凹坑的横截面形状和髓内针锁孔的横截面形状相同，横截面形状是圆形或者是椭圆形。
The cross section shapes of the pits are same with that of the lock hole of the intramedullary nail, which are roundness or ellipse.
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