Book sewing machine is one kind of book binding machines, by which the gathered signatures in paginal order from the collecting machine can be sewed to from book blocks.
锁线
是将
按码顺序已
册的书帖，通过锁线制书芯的械。
的；
形的Book sewing machine is one kind of book binding machines, by which the gathered signatures in paginal order from the collecting machine can be sewed to from book blocks.
锁线是将按码顺序已册的书帖，通过锁线制书芯的械。
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