This paper establishes some formulas on orientable closed surfaces in 3-dimensional space forms.
本文建立关于三维空间型中的可定向闭曲面的某些公式。
The metal wire was a fairly fast way to get the some volume and size; I also tried to cover the structures in clay and in paper mache to get some closed surfaces.
利用金属丝构造是获得一些关于体积大小的想法相当快的方式，我也试着用粘土和纸去覆盖这个构造，从而获得封闭的表面。
The quadrilateral grid graph of closed surfaces was obtained through surface slicing, offset point picking up, ordering of point array, 1d interpolation, and data merging.
经过曲面切片、型值点提取、点列排序、一维插值、数据融合，得到闭曲面四边形网格图。
Some properties of the "super plane" in space forms are investigated, which is helpful to construct the example showing the banding properties of the closed surfaces in space forms.
而且探讨了空间型中“超平面”的性质，这对构造体现空间型中闭曲面整体弯曲程度的例子是有帮助的。
His conjecture, made in 1904, was that in this four-dimensional world, all closed three-dimensional surfaces that are simply connected could be transformed to look like a three-dimensional sphere.
他在1904年就提出猜想：在四维空间，所有单连通的封闭三维面都能转化为一个三维球体。
This could be done with surfaces that change shape, or by using a system of holes and slots that can be opened and closed as appropriate to create suction that maintains laminar flow.
这将通过改变机翼表面形状，或采用能适当的开启和关闭孔、缝以吸住层流的系统来实现。
Other technology is embedded in the wall, and when the panel is closed, ultraviolet light kills bacteria that might have formed on surfaces.
墙面还植入了其他一些技术，当面板关闭的时候，就会有紫外线杀灭各处表面上可能已经形成的细菌。
The hinge has laterally spaced end portions (52, 54) on opposite sides of the central portion and having concave outer surfaces when the lid is closed.
所述铰链具有在所述中心部分的相反侧上横向间隔开的端部分(52,54)，并且所述端部分在所述盖闭合时具有凹形外表面。
The hinge has a central portion (50) with a convex outer surface, with the lid closed and as viewed in side elevation, that blends with a smooth curvature into outer surfaces of the lid and the base.
所述铰链具有中心部分（50），在盖闭合时并且从侧面正视图观 察时中心部分（50）具有凸的外表面，所述凸的外表面以平滑曲率融入所述盖和所述基体的外表面。
The valve stem and sealing surfaces are completely protected from dirt and corrosion by the stem cap, whether the valve is in an open or closed position.
不管是在阀门开启位置，还是关闭位置，阀杆和密封面有阀杆盖帽的保护，能防止污物入内，防止腐蚀。
The control strategy can guarantee the existence of the closed-loop system's sliding phase, furthermore, based on which, global stability of sliding motion on sliding surfaces is proved.
该控制策略保证闭环系统滑动阶段的存在性，并在此基础上证明滑动模态运动的稳定性。
This law states that pressurized fluid within a closed container-such as cylinder or pipe-exerts equal force on all of the surfaces of the container.
这个定律表明在一个密封的容器里，如缸体或管子，受压液体向容器表面所有方向施加相等的力。
This law states that pressurized fluid within a closed container-such as cylinder or pipe-exerts equal force on all of the surfaces of the container.
这个定律表明在一个密封的容器里，如缸体或管子，受压液体向容器表面所有方向施加相等的力。
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