• The message wasreproduced at the receiving station on electrochemically sensitivepaper, which left a blue mark when an electric current was passedthrough it.

    电化学感光纸接收站可将信息再次生成。电流通过感光纸会留下一带蓝色印记

    youdao

  • The message wasreproduced at the receiving station on electrochemically sensitivepaper, which left a blue mark when an electric current was passedthrough it.

    电化学感光纸接收站可将信息再次生成。电流通过感光纸会留下一带蓝色印记

    youdao

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进来说说原因吧 确定