以下为句子列表：
英文: Abstract: Backing weld procedure technique of all-position narrow gap and thick-walled pipe welding is developed about all-position single-pass welding section analysis,wire feeding behavior , weld arc length , welding current analysis,procedure and joint
中文: 文摘:从单焊道全位置区段、送丝行为、焊接弧长(电压)、电流行为分析、工艺试验和接头检验等几方面介绍管道全位置打底焊工艺特点，其研究成果对全位置焊接机的制造和调试具有普遍指导意义。
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英文: This controller is based on single-chip microcomputer AT89C51, and it can realize automatic welding, line voltage compensation, welding current and voltage display through the combining of constant current and voltage supply control with varied sets of st
中文: 该控制器以AT89C51为控制核心，在恒压和恒流控制结合的基础上可实现钢筋网焊自动化，并具备网压补偿、焊接电流电压显示、多套规范参数存储、故障自诊断及系统自保护等功能。
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