Figure 5.40.—Raw material delivery to input hopper.
Robert A. Freitas and William P. Gilbreath
1980
<a class="external free" href="https://en.wikisource.org/wiki/Page%3AAdvanced_Automation_for_Space_Missions.djvu/287">https://en.wikisource.org/wiki/Page%3AAdvanced_Automation_for_Space_Missions.djvu/287</a>