Ordinary computer keyboard is designed for double-hand manipulation, but it is not so convenient for special users as who have only one hand.
普通计算机键盘是为双手操作设计的，对于一些特殊的使用者比如只有一只手的操作者来讲使用起来就很不方便。
Features: the product is specifically designed for people who work long hours in their seats, such as computer users, clerks, drivers and so on.
特点：本产品专为长期坐着工作的人士而设计，如使用电脑者、文员、司机等。
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