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Nowadays, drunken driving is an extremely severe problem around the world.
Therefore, rules on this matter should set with caution.
The safest way is preventing the drunken people from driving
It would be much better to take a texi home than creating another social tragedy.
Using the bracelet as sensorial key of car doors
Alcohol makes human body sweat; if one drinks, the bracelet will automatically detect the alcohol level from sweat.
Kaohsiung City, Taiwan