Environment-Friendly Mercury Slip Ring With Low Electrical Noise Anti-Interference And No Friction For Video Signal System - AliExpress
Slip ring - Wikipedia
A2S -2 Conductor Mercury Slip Ring for Knitting Machine
High Working Speed Mercury Slip Ring/Rotary Joint with 2 Circuits Each 30A Plus 2 Circuits Each 4A - China Mercury Slip Ring, Slip Ring Connector | Made-in-China.com
Mercury Contact Slip Ring/Rotary Joint with High Working Speed and Big Current for Robotics Use - China Mercury Slip Ring, Slip Ring Connector | Made-in-China.com