Sprague 
(sprāg), Frank Julian 1857-1934.
(sprāg), Frank Julian 1857-1934. American engineer and inventor. He developed the first electric trolley system (1887) and made advances in electric elevator design.
| 单词 | Sprague |
| 释义 | Sprague (sprāg), Frank Julian 1857-1934. American engineer and inventor. He developed the first electric trolley system (1887) and made advances in electric elevator design. |
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