When you need a lot of artillery shells. The input belts have belt guards. Look for the constant combinators next to the pink light if you want to set reserve fluid levels or enable/disable it.
by Unknown Author · updated 7/8/2018 · 20

Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
When you need a lot of artillery shells. The input belts have belt guards. Look for the constant combinators next to the pink light if you want to set reserve fluid levels or enable/disable it.