送交者: catfish 于 2011-01-27, 13:08:47:

回答: no. 4 is need for position, not communication. 由 steven 于 2011-01-27, 12:20:48:

• That is impossible, for two points to maintain LOS from - steven (72 bytes) 2011-01-27, 13:16:52 (541724)
  • oops, "for two points to maintain LOS from each other and everywhere..." (无内容) - steven (0 bytes) 2011-01-27, 17:14:43 (541834)

加跟贴