This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Pxctl. Cabin Pressure and Bleed Air Control Panels on Boeing Own Wsombeck February UTC wsombeck Cockpits of Boeing Parts and systems of Boeing Next Generation Aircraft cabin pressurization systems
Page 2023 Free-images.com. All images are Public Domain