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Social Physics club (Middle M4-M6) => Momentum & Collision => ͤ: ikarus չҤ 11, 2011, 02:49:37 PM



Ǣ: ١´ѹẺ״ scatter ѹ 90 ͧ
Ǣ: ikarus չҤ 11, 2011, 02:49:37 PM
(http://a3.sphotos.ak.fbcdn.net/hphotos-ak-snc4/154965_156006121111313_100001057781561_279340_4674838_n.jpg)