7孔可调打孔机

"7孔打孔机，孔直径为6mm等,孔距：24.5-24.5-5, 29.67-29.67-29.67-29.67-29.67-29.67, 25.4-25.4-38..4, 25.4-25.4-57.2-57.2-25.4-25.4,一次性可打10张复印纸。 专利号:.X

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