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AT89C51menling
- AT89C51在楼宇对讲系统中的应用，给出了系统框架和构思-AT89C51 in the building intercom system, given the system framework and the concept of
intercom-features-
- 深圳楼宇对讲公司产品的特点与产品的优势说明-Shenzhen building intercom product features and advantages of the product descr iption