T-47 Yellow Toroidal Ring Core 47X23.5X18.3 mm – TOMSON ELECTRONICS
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Honeycomb Toroid Ring by Tom Threlfo | Download free STL model | Printables.com
Common Mode Inductor/Magnetic Ring Inductor/Toroidal Inductor Coil 100UH to 2MH | eBay
NASA Technical Reports Server (NTRS) 19670000098: Toroidal ring prevents gas ignition at vent stack outlet : NASA Technical Reports Server (NTRS) : Free Download, Borrow, and Streaming : Internet Archive
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Toroidal Ring Core at Rs 100/kilogram | Toroidal Transformer Core in Mumbai | ID: 13289139891
I designed this Toroidal ring launcher with a three-stage planetary gearbox and 48x ratio; 100% 3D printed with no hardware required! : r/3Dprinting
Factory Ferrite Power Toroidal Ring Core Inductor - China Inductor, Choke Coil Inductor | Made-in-China.com