光电开关发射的红外信号经反光板反射后由光电开关接收。
The infrared signals of the photoelectric switches are reflected by the reflected plate to be received by the photoelectric switches.
光电开关发射的红外信号经反光板反射后由光电开关接收。
The infrared signals of the photoelectric switches are reflected by the reflected plate to be received by the photoelectric switches.
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