| 摘要 |
The fuel cap is disposed at the rear part of the automobile, and is furnished with a casing main body, the cover having an operating portion, and a gasket. Where an external force directing from a rear part to a front part is received at a position which is at an outer peripheral edge of the operating portion and at a rearmost part, the operating portion is determined to be at the closing position such that the operating portion transmits a moment turning in the closing direction to the closer.
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