n. ripper
... bolt trimming machine 螺栓切边机 book trimming machine 切书机 lockstitch trimming machine 切刀平车 ...
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三面切书机 three-knife trimmer ; three sided trimming machine
三面刀切书机 three-knife book trimmer
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三刀切书机：设计用来裁切适量书本或杂志边缘的切纸机。
Three-knife trimmer: A guillotine designed with three knives for trimming sizeable stacks of books or magazines.
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