[电] photoelectric cut-off register control

guāng diàn qiē duàn diǎn kòng zhì ㄍㄨㄤ ㄉㄧㄢˋ ㄑㄧㄝ ㄉㄨㄢˋ ㄉㄧㄢˇ ㄎㄨㄥˋ ㄓˋ