作者: Cheryl A. Sheffield
DOI:
关键词: Portfolio 、 Structural engineering 、 Front panel 、 Engineering
摘要: A portfolio binder has a jacket including front panel, and rear panel foldably joined to the along fold line. flap is secured with fastening means for maintaining in closed condition. plurality of portfolios are individually retained jacket, each by an elastic band encircling line extending between covers associated joining covers.