How fire sprinklers work.
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Previously:
https://www.homemadetools.net/forum/...014#post134004
https://www.homemadetools.net/forum/...602#post174269
https://www.homemadetools.net/forum/...544#post122990
https://www.homemadetools.net/forum/...619#post197547
https://www.homemadetools.net/forum/...846#post220526
