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亦称藏绳锁线订。
Also called Sunk cord sewing.
youdao
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软皮线装：装订方法之一；它把锁线订后的各帖，装入纸书皮内。
Sewn soft cover: A method of binding in which section sewn signatures are fastened to a paper cover.
youdao
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软皮线装：装订方法之一；它把锁线订后的各帖，装入纸书皮内。
Sewn soft cover: A method of binding in which section sewn signatures are fastened to a paper cover.
youdao