3 ms·
https://patents.google.com/patent/US8246454?oq=8246454 https://patents.google.com/patent/US8246454?oq=8246454 look at image 10
by hawski 5y ago
https://patents.google.com/patent/US8246454?oq=8246454 https://patents.google.com/patent/US8246454?oq=8246454 look at image 10