https://tivoli.fysik.org/english/calendar/14-slanggungan/?L=0
14. Slänggungan: Wave swinger / Chain flyer | National Resource Centre for Physics Education
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https://modernmidways.com/ride-details.asp?rideid=47
Wave Swinger - Modern Midways - The Complete Carnival
Modern Midways is the complete carnival, providing rides, games, food and fun to fairs, festivals, and events in Illinois, Indiana, Georgia, Florida and...
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