释义 |
〔Sprague〕American engineer and inventor. He developed the first electric trolley system (1887) and made advances in electric elevator design.斯普雷格,弗兰克·朱利安:(1857-1934) 美国工程师和发明家。他发展了第一部电力机车系统(1887年),并在电梯设计上作了改进〔pantograph〕A similarly jointed framework, such as a power-collecting trolley on an electric locomotive or an extensible telephone arm.动臂装置:同样构造的有活节的结构,如电力火车上的电力机车或可伸性电话臂 |