California fireball(页面存档备份,存于互联网档案馆) (Phil Plait 31 May 2012) CAMS(页面存档备份,存于互联网档案馆) News blog (CAMS is an automated video surveillance of the night sky in search
movable rotor that was operated by cams on its plastic outer ring. Different outer rings had different arrangements of cams. The circuitry of the switches