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意思解释：（Board heart）指线装书书页正中折叠的空白部位。
指线装书书页正中折叠的空白部位。板，今多作“版”。罗振常《善本书所见录》:“《九经白文》，宋巾箱本…板心下方书刻工名。”…
Show folding is blank in the middle of thread-bound book page place. Board, make more today edition . Luo Zhenchang does place of good edition book see collection : Ah copy of Zi of poisonous bang punishs to call Dong watersides the road austral Xiao wrings of っ of calm of a pavilion or house on a terrace! Thin
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