中间齿轮

It deals with the invention and development of time-keeping apparatus in our country during a historical period of some three thousand years, tracing this development from remote antiquity with its sundial and clepsydra making use of the shadow of the sun down to the Dynasties of Han, Sui, Tang and Sung with their water-powered astronomical clockworks insta...

内容论述我国古代三千年左右有关计时器的发明和发展，自远古利用日影的圭表和日晷起，中间经汉、隋、唐、宋等朝代，附装在水力天文仪器上的水力天文钟，都采用了齿轮和凸轮的传动，即已都属于机械性。

It deals with the invention and development of time-keeping apparatus in our country during a historical period of some three thousand years, tracing this development from remote antiquity with its sundial and clepsydra making use of the shadow of the sun down to the Dynasties of Han, Sui, Tang and Sung with their water-powered astronomical clockworks...

自远古利用日影的圭表和日晷起，中间经汉、隋、唐、宋等朝代，附装在水力天文仪器上的水力天文钟，都采用了齿轮和凸轮的传动，即已都属于机械性。元代郭守敬以后，到明初的詹希元，更发展到独立时钟机构，並有了指针和表盘。可是近四百年，即自明代万历年间，西洋的自鸣钟传来我国，我国在计时器方面的工作，始终在模制阶段，自己的发明遂归于停顿。那次会议闭幕以后，会中曾用英文出版一次，我国1956年12月，《天文学报》4卷2期用中文出版一次。现在根据一些新资料，重新加以增删和改正。

The national emblem of the People's Republic of China is Tian'anmen in the centre illuminated by five stars and encircled by ears of grain and a cogwheel .

第一百三十七条中华人民共和国国徽，中间是五星照耀下的天安门，周围是谷穗和齿轮。

Article 105 The national emblem of the People's Republic of China is: in the centre, Tien An Men under the light of five stars, and encircled by ears of grain and a cogwheel.

第一百零五条中华人民共和国国徽，中间是五星照耀下的天安门，周围是谷穗和齿轮。

Article 137 The national emblem of the People's Republic of China consists of an image of Tian'anmen in its centre illuminated by five stars and encircled by ears of grain and a cogwheel.

第一百三十七条中华人民共和国国徽，中间是五星照耀下的天安门，周围是谷穗和齿轮。

Article 137 The national emblem of the People's Republic of China consist s of an image of Tian'anmen in its centre illuminated by five stars and encirc led by ears of grain and a cogwheel.

第一百三十七条中华人民共和国国徽，中间是五星照耀下的天安门，周围是谷穗和齿轮。

Based on the equations, a new method for the geometrical design of hypoid gears is presented.

在这组方程的基础上，提出了一种几何设计的新方法，以大轮的节锥角和节圆半径以及小轮的螺旋角这三个参数为自由变量，以准双曲面齿轮副的偏置角为中间变量，用数值求解方法能够非常方便可靠地确定节锥的参数。

The error of the center distance can be adjusted, in addition, the error of nonparallel degree also can be adjusted in horizontal plane and vertical plane. Meanwhile, we also may take out the middle adjustability mechanism, make it become general gear transmission mechanism system.

该实验装置，既可以调整输入、输出轴的中心距误差，也可以调整输入、输出轴在水平面和垂直面的平行度误差，同时，可以去掉中间的自调机构，变成一般的齿轮传动机构系统。

The clearance error of intermediate driving chain in the conventional main driving system and feed system influenced directly the working accuracy of NC machine tools.

传统的&电动机+皮带轮+速比齿轮&的主传动系统和&电动机+齿轮减速器&的进给系统，其中间传动链形成的间隙误差直接影响到机床的加工精度。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。