对于任意完全包含在圆环面上的曲面，这个曲线都不是它的边界。
See, this one also does not bound anything that's completely contained in the torus.
机电集成； 超环面传动； 定子加工； 环面蜗杆加工； 曲线梁； 最小能量法； 效率。
Electromechanical integrated; Toroidal drive; Manufacture of the stator; Manufacture of the toroidal worm; Curved beam; Minimum energy method; Efficiency.
可作为评价材料点蚀敏感性指标，要比传统指标（如点蚀电位和阳极极化曲线滞后环面积等）更加优越。
They had superiority as the indexes of materials pitting sensitivity than the traditional indexes such as, the pitting potential, the lag ring area in scan anodic.
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