... 全呼撤离：all call EVAC 全呼按钮：all call button 全国专业资格委员会：National Professional Qualifications Board ...
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Its small and lightweight design makes for comfortable wearing, while a multifunction call button manages all essential call functions.
小巧的设计让您配戴舒适，而多功能通话键则管理所有主要通话功能。
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