On Earth, rocks are eroded by wind and water, creating solid soil and sand. On the moon, the long history of micrometeorite bombardment has practically pulverized the rocky surface creating a layer of lunar soil dust or regoliths.
This lunar regolith could be a good scientific and industrial material. But for the Apollo project astronauts and their instruments, this fine and sandy material was definitely a problem. On the lunar surface in December 1972, Apollo 17 astronauts Harrison Schmitt and Eugene Cernan needed to repair one of the rovers, in an attempt to keep the dust away from themselves and the wheels.
This image shows the wheel and as a continuation of the fender itself an ingenious idea of using the spare maps and some clamp to create a system that does not cause dust to rise and disturb.
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