"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7247128 | Exercise assisting machine An exercise assisting instrument assists the user's knee-bending exercise, and lightens a burden and maintains safety of the user. It has a base 10, supporting columns 20, lifting mechanisms 30 consisting of lifting arms, lever arms 40, a... | 07/24/2007 |