查询词典 refractor

I have observed from cities for 30 years," he writes. Using a refractor "with a 5-inch f/5 Jaegers objective, I have observed 350 of 600 deep-sky objects that I know are possible, most of them many times.

我已经在城市里观测天体30年了，&他写道，&使用一台5英寸的折射镜，我已观测了我所知的500个深空天体中的350个，其中大多数都不只一次。

Using a refractor "with a 5-inch f/5 Jaegers objective, I have observed 350 of 600 deep-sky objects that I know are possible, most of them many times."

我已经在城市里观测天体30年了，&他写道，&使用一台5英寸的折射镜，我已观测了我所知的500个深空天体中的350个，其中大多数都不只一次。

This TMB designed 111mm diameter f7 focal ratio triplet refractor is well constructed, offers a proprietary?

这款TMB的三角支架折射望远镜构造精良：111毫米的口径， F7的焦比。

This 90mm telescope is the first fluorite APO refractor in the market,thanks to the flourite lens design, at f/11 focal ratio, the secondarychromatic abberation is eliminated.

90毫米的望远镜是第一萤石载脂蛋白折射在市场上，由于flourite镜头设计，在f/11镜头协调比例，二级色abberation是消除。

Plates of globular cluster M3, taken with the 40cm refractor at Sheshan station of Shanghai Astronomical Observatory, are used by this work. The difference of epoch of these plates is up to 81years. The positions and absolute proper motions of 24 stars in ACT catalogue, which links with the Hipparcos Catalogue based on the International Celestial Reference System, are used as the reference frame. Using the central overlapping principle, the absolute proper motions of 534 stars in the region of about 100'×100' around the cluster are determined. After the membership determination of the stars which based on the data of proper motions, average absolute proper motion components for the cluster of -0.3±0.3 mas/yr in R.A.

本文使用上海天文台佘山40厘米折射望远镜拍摄的14张最长时间跨度为81年的球状星团M3底片的PDS扫描结果，使用与 Hipparcos星表相联系的基于国际大球惯性参考系的ACT星表中的 24颗恒星的位置和绝对自行为参考架，用中心重叠法进行天体测量归算，得到了这个星团中心附近100'×100'天区内534颗恒星的位置和绝对自行，并利用这些自行对成员概率进行了估算，得到这个星团的赤经方向绝对自行为- 0.3±0.3mas/yr，赤纬方向绝对自行为-3.1±0.3mas／yr。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。