子午仪

The specific content of man-made earth satellite motion theory, power of observation and owned satellite operator, observation equipment and the establishment of such a number of observation points the content of .20 century, 60-70 years, have been used as a weather observation satellite launched high-altitude balloon, as the satellite observed the law of geometric measurement objectives of the United States launched TRANSIT .80 era satellites, it has several flights along different directions through the ring of satellites to address at any time, there will be a satellite-observable problems.

具体的研究内容有人造地球卫星运动理论、动力式卫星的观测及归算、观测仪器和观测点的设立等多项内容。20世纪60—70年代，曾用为气象观测发射的高空气球卫星，作为卫星几何测地法的观测目标。80年代美国发射子午仪卫星，它有几个沿不同经圈方向飞行的卫星，以解决任何时候都会有一颗卫星可观测的问题。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。