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https://patents.google.com/patent/US8246454?oq=8246454 https://patents.google.com/patent/US8246454?oq=8246454
by zekrioca 5y ago
https://patents.google.com/patent/US8246454?oq=8246454 https://patents.google.com/patent/US8246454?oq=8246454
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