Introduction - If you have any usage issues, please Google them yourself
Banks and other special departments to the efficient handling of a large number of coins, such as counting, sorting, packaging, etc. so that it is recirculated, unmanned vehicles, payphone requires real-time identification of the coin, the vending machines in addition to the identification, but also provide a homing function. And at present in the world, the coin with its low cost, the number of circulation, wear-resistant, easy to back