Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
When it comes in rush hour during on-duty and off-duty,
amount of carbon dioxide exhaust from cars and motorcycles increased.
It seriously affected the health of the traffic police.
By wearing a Whistle Mask to avoiding inhaled too much carbon dioxide,
could blow a whistle at the same time.
It would not affected traffic police to direct traffic.
Southern Taiwan University of Science and Technology
Southern Taiwan University of Scien
Jyun-Sheng,Wu Zhe-Ming,Lin You-Hong, Ling