434,401. Models. DRAGOVICS, J., and SZABO, J., Szombathely, Hungary. March 28, 1935, No. 9662. Convention date, March 28, 1934. [Class 146 (ii)] Models for educational purposes, especially adapted for teaching geometry, projection, and crystallography, are formed of transparent and substantially non-breakable sheet material which is used both for the outer surfaces and for other planes such as interior planes to be visualized, while the constructional lines of the model are formed of opaque and preferably coloured rods. The sheet material used may be a cellulose product such as acetyl cellulose, sheets of which can be easily cut, formed, and cemented together, and are obtainable in different colours.
展开▼
机译：434,401。楷模。 J. DRAGOVICS和J. SZABO，匈牙利Szombathely。 1935年3月28日，编号9662。会议日期，1934年3月28日。[Class 146（ii）]用于教育目的的模型，特别适合于教授几何，投影和晶体学的模型，由透明且基本上不易碎的薄片形成这种材料既可用于外表面，也可用于其他平面（例如内部平面）的可视化，而模型的构造线则由不透明的，最好是有色的杆形成。所使用的片材可以是纤维素产品，例如乙酰纤维素，其片材可以容易地切割，成形和粘合在一起，并且可以以不同的颜色获得。
展开▼
