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Question:

why are there spikes on lightning rod?

Please explain this theory.. I dnt gt itthanks

Answer:

Automatic stainers and coverslippers, Microtomes, water bath's, thermometers wall ovens, magnetic mixers, forceps, microwaves, coplin jars, funnels, reagent bottles, balances, safety glasses, gloves, scalpels, biohazard sheilds, cutting boards xylene and alcohol recycling systems, tissue processors.
What they don't tell you is to replace the smoke detector, these things are not made to last for years, instead replace them yearly, they are cheap, at least the ones around here are.

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