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| Figure 2-5 Typical construction of core-type transformer. |

| and L stampings, or a split-spiral-wound core. The cores are thus constructed to allow them to be inserted within the coils. The joints in the construction of the cores may overlap or butt together; the two halves of the spiral butt together. Mechanically, these joints must be rigid and strong, not only to prevent their coming apart under severe stress, but also to hold down the noise which may emanate from their vibration during the operation of the transformer. |

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