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: Abstract: With the aids of computer's hardware,executive mechanism of weld arc length automatic controller of all-position pipe welder and additional software,an automatic system for arc striking has been developed,in which touch-starting method using tin
中文: 文摘:用全位置自动焊管机弧长自动控制系统的计算机硬件和执行机构，仅增加部分程序，设计了采用小电流接触引弧法的自动引弧系统，钨极烧损和焊缝夹钨远小于普通的接触引弧方式，引弧成功率很高。
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英文: Based on analysis for vacuum arc remelting process and according to actual melting condition, some partial strategies which is helpful for control of melting aim were presented, for example, arc length control, melting speed control, decouple control and
中文: 摘要通过对真空电弧重熔炉工艺过程的分析，根据冶炼实际情况，提出了一些有助于控制冶炼目标的局部策略，如弧长控制、熔速控制、解耦控制等。
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英文: The arc length from alveolar foramina to the begining site of crista infrazygomatica is ( . 8±. )mm(left) or (7. 9±. 8) mm (right).
中文: 牙槽孔距颧下嵴起始部的孤长,左侧( .8±.)mm,右侧(.9±.8)mm。
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