| 摘要 |
A gasket is formed of a metal plate, and includes a plurality of coating layers laminated on the metal plate. The coating layers may be a first coating layer laminated on the metal plate and at least one second coating layer laminated on the first laminating layer. An internal-layer confirmation portion is provided in a part of the second coating layer where the second coating layer is not formed so that presence or absence of the first coating layer is seen through the internal-layer confirmation portion.
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