A light pointer is often useful with a slide projector.

光指示器幻灯片放映机一起使用。

His major inventions include phonograph, kinetoscope, dictaphone, incandescent light bulb and tattoo gun etc.

他主要发明有留声机、活动电影放映机、录音机、白炽灯和纹身枪等。

Sport and the movie have been inseparate since the projector had been invented by Thomas Alva Edison.

摘要运动电影从迪生发明放映机那一刻起即结下不解之缘。

The Lumiere brothers of France invented a device called the cinematograph towards the end of the 19th century.

法国卢米埃兄弟于十九世纪末发明了一种叫做活动电影放映机。