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Catapult has a long history, and today has as much anymore, in films and Slingshot are common, and Slingshot has been rarely seen in real life, jiahua sporting developing Slingshot culture, inherited and developed various slingshots. Slingshot appeared up to now, no complete historical data can be queried, but estimates from ancient planks catapults to modern card ball catapult, also has a history of thousands of years. Now people quietly picked up Slingshot, looking for a wild and has not yet been evolved out of childhood memories. Slingshot shooting, athletics can catapult exercise further, race the way athletics has a set of rules developed, might even participate in the Olympic Games (* ^ __ ^ *) hee hee ... ...