“Helwan Observatory”的意思、由来-开放百科全书

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

词条	Helwan Observatory
释义	SeeHelwan
随便看	John Wayne Mason John Wayne/Orange County Airport John Wayne Parkway John Wayne Tucker John W. Baker John W. Baker Interdistrict Elementary School John W. Barfield John W. Barnett John W. Baumgartner John W. Berry John W. Betrozoff John W. Blaisdell John W. Blodgett John W. Boutwell John W. Bowen III John W. Bower John W. Boyd John W. Boyle John W Broad John W. Broad John W. Brown John W. Browning John W. Brownson John W. Brownson (Wisconsin politician) John W. Brunius