Why do not you design an underwater alarm Every person with a swimming like this when the accident can press the alarm, the lifeguard will know someone accident
What is the meaning of the money if it is someone who is doing it
This method is still worth considering the place, but the current point of view is not practical. I think, like the Americans to learn, they have a swimming pool around the bottom of the pool, lifeguards only need to look at the sidelines in the pool can understand the underwater situation, but this method will certainly cause in China dispute.
So that the cost of the high ~ ~ again, so you really drowning, you call the help is too late, which still remember by the alarm ... even if you took, lifeguard how to know which direction you are ... or the same Take the root of bamboo to catch you, or throw the circle down.
