transparency projection apparatus
... 幻灯放映机 Slide projectors 幻灯片放映设备 Transparency projection apparatus 幻灯片框 Frames for photographic transparencies ...
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彩色幻灯片放映设备 color slide equipment
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因此，我就对着麦克风讲话然后伸着身子好让远程设备能放映我的幻灯片。
So, there I was speaking into the microphone and then stretching my body to make the remote advance my slides.
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