| 摘要 |
Coil frames and transformers are provided. A coil frame includes a sub-coil-frame and an extended frame. The sub-coil-frame is utilized for winding a metal coil thereon. The extended frame is attached to the sub-coil-frame. The extended frame has a hole and a protrusion. The hole of the coil frame can be connected with the protrusion of another coil frame.
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