“A small cover on the sidewalk with a metal pattern, foot for scale”
A: "It’s a rain and frost/ice detector. A small current is on the 2 metallic circles, they are not touching and are isolated against each other. When raindrops connect the 2 metals, the small current is amplified or switched, so it can trigger a pump or close windows that are fully open at that time and rain or snow won’t damage things."
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Albert 2 year s ago
#14 yes, I confirmed, it’s for vacuuming.
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Mack 2 year s ago
Albert,
I confirm, it's for vacuuming
I confirm, it's for vacuuming
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Davey 2 year s ago
Mack,
and I confirm they have confirmed it is for vacuuming
and I confirm they have confirmed it is for vacuuming
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Kristy 2 year s ago
Davey, and here I thought it was for sucking the life out of the commentary.
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Emma 2 year s ago
#7 you've spelled bdsm wrong. That specific setup is called crucifixion simulator or coloquially the Jesus Kit.
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Lea 2 year s ago
#12 Its not only related to that telescope. Its the main mirrors underside. The brands name for the glass being used is 'Pyrex'.
I confirm, it's for vacuuming
and I confirm they have confirmed it is for vacuuming