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Ruler headest / office

Ruler headest
Ruler headest

The long earphone wire always beset us in our daily life, while we cant take advantage of it profitably. The Rule Headset
was just design for this issue. The earphone wire of it had been devised meticulously, and also be endowed with another
function, that is we can use it to measure some important dates efficiently, whether curves or lines..

University

Xiangtan university

Xiangtan university
Xiangtan, China