This paper discusses how to design and implement the phone digital record system.

Aiming at the problems such as person and environment limited and fussy operation that exist in one air-plane speech alarm system’s speech information recording,we bring an effectial solution.

Digital audio chip recording system and its aplication;

It can record alarm and make dialogue integrating automatic recording and alarming with double sides speak and calling.

This dissertation proposes that in addition to other activities, students use recording in their speaking practices.

Based on the therotical knowledge of sound recording arts stuedies in undergraduate level andethnomusicological theories with related fieldworks, academic activities that pursued in graduatelevel, the writer gradually realized that the participation of sound recording in fieldworks is a quiteimportant technique tache.

The main ingredients of the organic impurities in DSD acid,their formation mechanism and effects on the fluorescent whiteners therefrom;

Sponge iron making with iron sludge and its utilization in DSD acid oxidation wastewater treatment;

Reflection on Revisal of Chemical Industry Standard HG/T2279-2000 of DSD Acid;

Study on System of Recording and Videotaping in Interrogation;

However,the realization of the function of recording and videotaping system needs the following prerequisite:the recording and videotaping must covers the whole course of the interrogation,and rule of evidence and procedure must be perfected.