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ARRANGEMENT FOR TRAINING TENNIS PLAYERS WITH A BALL
ARRANGEMENT FOR TRAINING TENNIS PLAYERS WITH A BALL
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机译:网球训练网球选手的安排
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摘要
purpose изобретени вл етс effectiveness of training by simulating the real conditions. the device contains a vertical отражательную stove.in the lower part of the stove имеетс station, simulates t
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