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Air Core Coil with Insulating Film Cladding
The air core coil is composed of two parts, namely the air core and coil. When we see the name, it is naturally to be understood that there is nothing in the center. Coils are wires that are wound circle by circle, and the wires are insulated from each other.
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Flat Vertical Winding Motor Coil
Flat coils are currently mainly used in some high demanding situations, such as flat micro-motors.