projector 考研

There is a new projector in my office.

我的办公室里有一架新的幻机。

A light pointer is often useful with a slide projector.

光指示器经常与幻片映机一起使用。

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

摘要运动与电从爱迪生发明映机那一刻起即结下不解之缘。

Optical projector, tension tester, pressure tester and torsiometer are the testing instru-ments. Testing results can be typed automatically.

检测设备有光学投仪、拉、压、扭力测试仪，检测结果由测试仪自动打印。