发明名称 Storage pocket - for microfilm of unplasticised pvc
摘要 Storage pocket is of pref. plasticiser-free PVC and has individual pockets between clear leaves, whose edges are joined, leaving insertion slits, by welding along the outer edges and the edges of the pockets. - Pref. the leaves are of unequal thickness; the thicker one having the slit.
申请公布号 DE2026954(A1) 申请公布日期 1971.12.09
申请号 DE19702026954 申请日期 1970.05.26
申请人 发明人
分类号 G03B21/64 主分类号 G03B21/64
代理机构 代理人
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