{"type":"rich","version":"1.0","title":"**正投影**","provider_name":"Coggle","provider_url":"https://coggle.it","thumbnail_url":"https://static.coggle.it/diagram/YXeSRFKX7iPvw9lU/thumbnail","width":1920,"height":1200,"html":"<iframe width=\"1920\" height=\"1200\" src=\"https://embed.coggle.it/diagram/617792445297ee23efc3d954\" frameborder=\"0\" allowfullscreen></iframe>"}