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Circus 4 year s ago
#13 As it was found among crochet hooks and knitting needles it could also be part of a knitting machine? Have seen similar parts for such machines; They are used for hooking the yarn when making patterns.
       
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Occasion 4 year s ago
#15 is to alert drivers that an emergency vehicle is approaching the intersection.
       
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Police 4 year s ago
#13 is definitely a record changer spindle.
       
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They are on a wall at my uni, I think it has smth to do with electricity. What are they used for?

A: They are insulators for transmission lines.

 

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