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Zipper whistle / whistle

Zipper whistle
Zipper whistle

Zipper whistle
When communication equipments are unable to locate and call for help during natural disasters (earthquake, tsunami, etc.), zipper whistle is the most accessible and implementation way for help because of the combination of the physical structure of zipper and whistle 。When you are trapped, just need to whistle to sent a signal for rescuers to find you。The zipper whistle is also suitable for school uniforms of students ,so that they can sent a distress signal at any time。

University

WUHAN DONGHU UNIVERSITY

WUHAN DONGHU UNIVERSITY
Wu Han, China

yao zhang,
WUHAN DONGHU UNIVERSITY