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Niels Christensen : ウィキペディア英語版 | Niels Christensen
Niels Christensen (1865-1952) was a Danish-American inventor whose principal invention was the O-ring, the ubiquitous hydraulic seal. ==Early years== Niels Anton Christensen was born on a farm in Tørring-Uldum Municipality, Denmark. He showed an early aptitude for mechanics and apprenticed to a machinist in Vejle, Denmark. After completing his apprenticeship, he entered the Technical Institute of Copenhagen, now the University of Copenhagen Faculty of Science. In 1891, Christensen immigrated to the United States when he was 26 years old.〔(''No. 555:O-Ring'' (John H. Lienhard, University of Houston) )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Niels Christensen」の詳細全文を読む
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