本语言实验室红外线信号传输系统受中国国家知识产权局发明专利保护。

The infrared signal transmission system in language LABS is protected by China patent.

youdao

本语言实验室红外线信号传输系统受中国国家知识产权局发明专利保护。

The infrared signal transmission system in language LABS is protected by China patent.

youdao