双曲面

The OSIRIS telescope is a Three Mirror Anastigmat consisting of conic surfaces: a concave hyperbolic primary, a convex parabolic secondary and a concave spherical tertiary.

OSIRIS 望远镜是一个三反射系统，由一个凹双曲面主镜，一个凸抛物面次镜和一个凹球面三镜。次镜 M2在中间，主镜 M1和三镜 M3呈离轴配置。

Takahashi also makes observatory telescopes which include: 350mm hyperbolic astrographs, 300 and 400mm Cassegrains, 200, 250 and 300mm triplet apochromatic refractors and the large EM-3500 mounts to carry them.

高桥也制造天文台用的350mm双曲面镜，300和400mm的Cassegrains， 200，250和300mm的三片APO折射镜以及支撑它们的大型EM-3500赤道仪。

Certainly it will be very useful to improve spiral bevel and hypoid gears industry in our country.

这对提高我国弧齿锥齿轮和准双曲面齿轮润滑设计与应用水平有重要价值。

A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the cone.

具有抛物面主镜和双曲面次镜的一种折射式望远镜；光线被集中到主镜中心的孔径。

2At drive than will certainly,driven gear, while having the more same sizes, hyperboloid have diameter not larger of gear wheel not initiative than corresponding spiral awl gear wheel, intensity and bigger initiative gear wheel axle and bearing rigidity of higher teeth of a cogwheel.

螺旋角是指在锥齿轮节锥表面展开图上的齿线任意一点A的切线TT与该点和节锥顶点连线之间的夹角。在齿面宽中点处的螺旋角称为中点螺旋角(图5—4)。通常不特殊说明，则螺旋角系指中点螺旋角。双曲面齿轮传动比为

Now there is a hyperboloid, a concave ellipsoidal surface and a convex sphere surface need to be done.

现在是一个双曲面，一个凹椭球面，一个凸椭球面

By introducing the concept of ideal transmission, the expressing way of meshing force and meshing damping is given, which is the foundation of establishing complex equation of gear dynamics.

通过引入理想传动的概念，给出了弧齿锥齿轮和准双曲面齿轮啮合力和阻尼力的表示方法，这一方法是复杂动力学方程建立的基础。

Hypoid gears are widely used in the driving axle of automobiles.

准双曲面齿轮是齿轮传动中最为复杂的一种。

The system has a scan volume of 8 x 2 x 2 metres and is able to inspect parts which have a complex, dual curvature geometry, by virtue of the fact that the motion of the squirters on each side of the part are totally independent - ie they are not linked by a bridge or any other constraining structure.

系统的扫描范围是8*2*2m，可检测复杂双曲面零件，该功能的实现主要是由于零件两边的喷嘴能够完全独立地运动-例如，他们不与桥连接或任何其他的阻碍结构连接。

In this paper,Litvin's Local Synthesis Method was used to determine all machine-tool settings for HGM and HGT cutting,with which the location of oontad area,the dimension of contact ellipse,the direction of contact path,the shape and magnitude of transmission error of machined hypoid gear drive can satisfy prescribed requirement aoeurately.

本文应用Litvin的局部综合方法进行了准双曲面齿轮切齿设计的推导。通过一次计算便能获得HGM和HGT加工的准双曲面齿轮的全部切齿参数。

At the rear was an innovative combination transaxle with the gearbox, clutch, differential, and inboard-mounted drum brakes.

在后面是与变速箱，离合器，差的创新结合变速，和内侧安装鼓式制动器。

For more people can apprecaite and have the master work, there is reproduction painting appears in the market, the large various selection of paint,the high saturation of color plus the plentiful sfumato, to make the reproduction perfect copy and detail as original painting, so as to meet the requirment of amateurs who love art paintings,they do not need to pay high price to get classical paintings.

颜料色域广，色彩饱和度高，色彩层次丰富，图像色彩还原真实，能完美的复制原作，满足艺术爱好者欣赏，艺术爱好者们不用支付昂贵的价格就能拥有经典油画。