免費線上 OTB 轉 DXF 轉換器

This format was created by Nokia for use in its proprietary phones. A bitmap image was used to transfer image files between devices over a wireless connection. It was mainly used when exchanging multimedia text messages that support inserting pictures.

This format is used for exchanging graphics data between SAPR programs. It was initially created for AutoCAD in 1982. It contains information regarding vector graphics in binary or ASCII. It’s used as an open alternative to the closed DWG format.