Hof set the world record for full body ice contactendurance in 2004, when he immersed himself in ice for 68 minutes.
霍夫曾经于2004年创造了整个身体耐冰的世界记录，当时他把自己整个儿淹没在冰块中68分钟。
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In this paper, contactendurance limit diagram of 45 normalizing gear is obtained from contact fatigue teste on 8 pairs of CATT gears. It is worthy reference for a calculation of gear design.