1、
The spine of each section is printed with rectangle or short thick rule called collation mark.
在每帖的帖脊印上称为帖标的黑色方块或粗黑短线.
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The spine of each section is printed with rectangle or short thick rule called collation mark.
在每帖的帖脊印上称为帖标的黑色方块或粗黑短线.
网络文摘精选
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