collision.theory: P1040688
collision.theory: P1040687
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collision.theory: P1040685
collision.theory: P1040684
collision.theory: P1040681
collision.theory: P1040679
collision.theory: P1040673
collision.theory: P1040672
collision.theory: P1040671
collision.theory: P1040670
collision.theory: P1040669
collision.theory: P1040667
collision.theory: P1040666
collision.theory: P1040665
collision.theory: P1040664
collision.theory: P1040663
collision.theory: P1040660
collision.theory: P1040653
collision.theory: P1040652
collision.theory: P1040651
collision.theory: P1040649
collision.theory: P1040648
collision.theory: P1040647
collision.theory: P1040646
collision.theory: P1040642
collision.theory: P1040641
collision.theory: P1040639
collision.theory: P1040638
collision.theory: P1040637