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When a ship especially like a refugee-ship sinks, the percent chance of people's survival is extremely low. This is mainly because they either are swallowed by the waves and are not able to hold out in the water. By so, it is common to miss the "golden time" that they could be rescued. Roll-Tube is an innovative, new type of tube that will surely help as many people as possible who need desperate help from drowning in emergency situations.
Gwangmyeong-si, Gyeonggi-do, South Korea