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裁断作业时采用光电管控制，操作最安全。
During the cutting operation, the photoelectric tube control is adopted with the most safe operation.
youdao
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那扇门是通过操纵一个键盘，用光电管来控制的。
The door is photocell controlled by operating a keyboard.
youdao
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那扇门是通过操纵一个键盘，用光电管来控制的。
The door is photocell controlled by operating a keyboard.
youdao