Links 1 and 2 are connected by turning pairs A and B to the base, and their turning axes are perpendicular and intersect. Links 1 and 2 contact each other through edges a-a and b-b of triangular prisms d and f. Edge a-a of link 1 is parallel to the turning axis of this link and edge b-b of link 2 is parallel to the turning axis of this link. Angle ϕ₂ of rotation of link 2 is related to angle ϕ₁ of rotation of link 1 by the equation ϕ₂=arcsin((r₁/r₂)sin(ϕ₁)) for r₂=r₁ , ϕ₂=ϕ₁.
$518$SL,CL$