欧美看片一区二区三区四区|91麻豆精品秘密在线观看推荐|日韩av在线播放免费|欧美体内射精bwbwbw|一区二区三区AV夏目彩春|艳妇乳肉豪妇荡乳av福利|丁香花成人社区|国产一级A片免费播放|国产suv精品一区二区六|日日做,国产深夜男女无套内射,亚洲欧美一二区二区三区国产精品,麻豆精品传媒国产剧观看体验,17吃瓜网官网,亚洲专区av,亚洲精品影视

<p id="cbtpb"><ins id="cbtpb"></ins></p>

<sup id="cbtpb"></sup>

中 | EN

Home > Astronomy Research > Collections > Telescope

Astronomy Research

Ramsden

09/02,2020

Telescope Type:Handheld Reflector

Country of Origin: England Date:c.1762-1800

Objective Lens Diam：2 1/4-inch (57-mm) OTL: 44 1/2"

【Previous】：Bardou&Son

【Next】：Dollond

Copyright @ Beijing Planetarium All rights reserved

<ul id="z3wqi"><menuitem id="z3wqi"></menuitem></ul>