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白卡纸 ivory board白底白版纸 (这个没有专门的词,至少我不知道,给你一个解释吧)A dry photographic or photocopying process in which a negative image formed by a resinous powder on an electrically charged plate is electrically transferred to and thermally fixed as positive on a paper or other copying surface. 灰底白版纸 grey manila board(其实根据这个词可以推出上面的)
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