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  OGND - results/titledata

  http://swb.bsz-bw.de/DB=2.104/SET=1/TTL=1/CMD?retrace=0&trm_old=&ACT=SRCHA&IKT=2999&SRT=RLV&TRM=118627473

  Keine Beschreibung vorhanden.

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  OGND - results/titledata

  http://swb.bsz-bw.de/DB=2.104/SET=1/TTL=1/CMD?retrace=0&trm_old=&ACT=SRCHA&IKT=2999&SRT=RLV&TRM=134076842

  Keine Beschreibung vorhanden.

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  US6840893B2 - Jumping device for exercise - Google Patents

  https://www.google.de/patents/US6840893?dq=ininventor:%22Tae-Hyuk+Yoon%22&hl=en&sa=X&ei=cNN4U-6WCsbB7Ab4CA&ved=0CDoQ6AEwAA

  Disclosed is a jumping device for exercise including an arc-shaped plate spring, a vertical member coupled to the plate spring, a footrest coupled to the vertical member while extending horizontally, a hinge lever hingably coupled to the footrest, a…

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  Category:Members of the Russian Academy of Sciences – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Category:Members_of_the_Russian_Academy_of_Sciences?uselang=de

  Keine Beschreibung vorhanden.

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