An air trap can be anything, really. Basically, it is a chamber half filled with water with one input and one output, but as the water flows through it, air bubbles can get trapped in it. You want this right before the pump in EVERY circumstance, and you don't want it to ingest any air into the output. In it's simplest, it can be a T junction with a fill tube. Some are really complicated. There are design ideas all over in this forum.
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#!/bin/sh {who;} {last;} {pause;} {grep;} {touch;} {unzip;} mount /dev/girl -t {wet;} {fsck;} {fsck;} {fsck;} {fsck;} echo yes yes yes {yes;} umount {/dev/girl;zip;} rm -rf {wet.spot;} {sleep;} finger: permission denied
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