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Keypoint 4: X =0, Y =-R2p, Z =0, Click Apply.
Keypoint 5: X =0, }} Y {{=-inter, Z =0, Click Apply.
Keypoint 6: X =R1, Y =R1-inter, Z =0, Click Apply.
...
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Keypoint 4: X =0, Y =-R2p, Z =0, Click Apply.
Keypoint 5: X =0, }} Y {{=-inter, Z =0, Click Apply.
Keypoint 6: X =R1, Y =R1-inter, Z =0, Click Apply.
...