| 摘要 |
A rider helmet comprising a first lens pivotally mounted to the helmet, a second lens pivotally mounted to the helmet in spaced apart relationship to the first lens, a recessed slot in the helmet and lens retention means in the recessed slot wherein the first lens and the second lens are manually operable between a stored position inside the recessed slot and an operational position outside of the recessed slot with the lens retention means selectively retaining the first lens and the second lens in either the operational position or the stored position.
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