How does the power company know when to replace the insulators. Do they know ahead of time when to replace them? Or do they just end with an explosion or something. Or can they usually last forever?
Moar Insulators Coming! - Possibly getting moar insulators today or tomorrow from the same place I got this Hemingray CD 154. - February 11, 2014
Do you think this is real? - www.theodoregray.com/periodictable/Samples/092.30/s12s.JPG Do you think this insulator is real of… - January 12, 2014
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