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Mounted to the inside of the helmet shell, the system is extremely small and lightweight.
该系统非常小巧轻便，安装在头盔内侧。
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A safety helmet comprises a shell and a heat dissipating device.
一种安全帽，其包括：一个外壳和一个散热装置。
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A safety helmet comprises a shell and a heat dissipating device.
一种安全帽，其包括：一个外壳和一个散热装置。
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