sign·board /ˈsaɪnˌbord, ˌbɔrd/
  招牌,布告板
  Sign·board n. A board, placed on or before a shop, office, etc., on which ssome notice is given, as the name of a firm, of a business, or the like.
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  signboard
       n : structure displaying a board on which advertisements can be
           posted; "the highway was lined with signboards" [syn: sign]