| 单词 | compound lever |
| 例句 | The machine is provided with a hand and a foot feed by means of the compound lever w z, Fig. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The compound lever scale on the principle of the steelyard, but arranged to be used with a platform, was invented and came into use in the United States about 1831. Inventions in the Century 2011-07-20T02:00:14.643Z For bending large size rods, heavy compound levers were used; the lighter rods were bent by the device shown in Fig. Concrete Construction Methods and Costs Many devices have been added to the spherometer to make it as sensitive as possible, such as the contact level, the electric contact, and the compound lever contact. Scientific American Supplement, No. 484, April 11, 1885 Slowly he moved the weights along, by means of the compound levers, until the air glider was on an "even keel" so to speak. Tom Swift and His Air Glider, or Seeking the Platinum Treasure He seemed to be merely a red-faced inanimate object, that worked by strange and compound levers. Ptomaine Street The pontoon may also be made available for lifting heavy weights, by fitting a pair of compound levers or other apparatus at one end, the lifting power being in the pontoon itself. Scientific American Supplement, No. 275, April 9, 1881 |
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