Polyconic international projection parameters for Iran maps in QGIS

In this projection, maps covering the entire territory of the Islamic Republic of Iran are created (for example, a geological map of Iran). In QGIS, simply copy the projection parameters string to "Settings → Custom Projections..." and save it under any name:

+proj=poly +lat_0=0 +lon_0=54 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs

Fig. Geological map of Iran