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Two teeth parts 15 around which a winding 14 is wound, and a teeth connection part 16 that is arranged between the two teeth parts 15, connects the teeth parts 15 together, and has an attachment hole formed therein are arranged so as to be lined up in a second direction D2 which is the arrangement d

Two teeth parts 15 around which a winding 14 is wound, and a teeth connection part 16 that is arranged between the two teeth parts 15, connects the teeth parts 15 together, and has an attachment hole formed therein are arranged so as to be lined up in a second direction D2 which is the arrangement direction. The teeth connection part 16 includes a support part 17 that supports the winding 14. The support part 17 includes: projection parts 17a that project toward both sides in a first direction D1, which is the width direction, respectively from both end parts, in the second direction D2, of the teeth connection part 16; and a space part 17b formed between the projection parts 17a in the second direction D2.

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