| 摘要 |
Boards attached to the backs of seats, in front of windows on public transport vehicles as well as other public sites. There are two board models which are resistant and easy to operate for those who know the product, but they come equipped with devices which deters vandalism: after the removal of an Allen bolt, the seatback board latch needs to be moved correctly and a very slender ruler must also be used to remove the material from the board. A bag may be attached to the seatback board to distribute free promotional flyers and pamphlets.
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