The 100.33s sound as beautiful as they look. XTZ Sound has a real gem on its hands – a true high-end entry.

33的声音和外观一样动人。XTZ手中的真正宝贝，一款货真价实的高端产品。

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This paper gives a brief introduction to the design, block diagrams, operation principles and making of XTZ-B automatically monitoring device for ring-receiving system.

现对XTZ - B型收铃系统自动监视装置的设计思路、方框组成、工作原理、实现方法进行扼要介绍。

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