https://www.machinedesign.com/archive/article/21821427/custom-slip-rings
UEA slip rings are custom built for applications such as storage silos, waste-treatment facilities...
custom slip ringsmachine design
https://www.motioncontroltips.com/standard-versus-custom-slip-rings-and-inductive-capacitive-wetted-mercury-variations/
Oct 17, 2022 - Slip-ring variations abound — and the advanced components come in bore sizes from half an inch to many feet in diameter — for medical-imaging machines
custom slip ringsstandardversusinductivecapacitive