2) Stress measure thorugh various means (straing gauge, x-ray defractography, magnetorestrictive sensors , magneto elastic sensors..._
3) Meaure the power transmitted and RPM and calculate.
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Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches