3) 环形面（loop surface） 所谓的环形面（loop surface）就是和选定的母面有公共边的所有面所组成的一个面环（不包括 母面），如下图所示 环形面的选择方法...
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open-loop surface water system 开式地表水换热系统
closed-loop surface water system 闭式地表水换热系统
Loop Surface Set 圈曲面集合
open-loop surface 开式地表水换热系统
Closed-loop surface heat pumps 闭式地表水源热泵
Open-loop surface water heat pumps 开式地表水源热泵
closed loop surface-water heat pump 闭式地表水源热泵
So, and similarly, if I take any other loop that avoids the origin, I can find, actually, a surface bounded by it that does not pass through the origin.
类似的，对于任何不经过原点的环路，都能找到一个以之为界的曲面，该曲面不经过原点。
Can I find a surface that's bounded by this loop and that does not pass through the origin?
能找到一个以该环路为界，且不经过原点的曲面吗？
The improved blade according to claim 1 wherein a portion of the rovings extending from the loop towards the trailing edge comes to the surface of the filling towards the leading edge.
改进的刀片，根据权利要求1，其中一部份的无捻粗纱延长从回路对尾缘来表面填补迈向领先地位。
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