光盘，光记录装置，光重放装置，保密通信方式或程序使用许可方式。
Optical disk, optical recorder, optical producing device, encrypted communication system, and authorizing system for use of program.
光盘，光记录装置，光重放装置，保密通信方式或程序使用许可方式。
Optical disk, optical recorder, optical producing device, encrypted communication system, and authorizing system for use of program.
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