这种设备有一个可移动摄像头。顾客志愿者捆扎一个头巾，摄像头跟踪他们在店里的走动，记录被摄到的最多的货架和走廊。
This is a device which shoppers volunteer to wear taped into a headband, and which traces their eye movements as they walk round the shop recording the most eye-catching areas of shelves and aisles.
本实用新型可代替纸带，捆扎各种面额的钞票。
The utility model can replace paper belts to bundle banknotes of various face values.
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