The main function and feature of welding process management expert system is introduced.
介绍了焊接工艺管理系统主要功能及特点。
The author introduce the structure, function, feature, main technique parameters and system operation condition of the main dam security monitor system of the Chengbihe reservoir.
介绍澄碧河水库大坝安全监测系统的结构、功能、特点，主要技术参数及系统运行情况；
The essay defines the scope of such a negative sentence pattern, describes its structural feature and expounds its main pragmatic function.
论文界定了这种否定句式的范围，描述了其形式构造特征，阐述了其主要的语用功能。
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