The molten observation hole needle (3) is arranged on the pipe fitting body so that a welding progress can be conveniently detected, and the welding quality can be controlled.
焊接熔观察孔针(3)设置在管件本体上，方便检测焊接进程，控制焊接质量。
The local branch of Ivy tech, a community college, agreed to create a three-week welding course to teach the specialised techniques Progress Rail USES.
一所社区大学，也是当地的常青藤科技分院同意针对ProgressRail所需的专业技术，开设为期三周的焊工课程。
The welding technology in our country has made a great progress, and our country becomes the largest welding material consumption country in the world.
我国焊接生产技术有了巨大的进步，已经成为世界最大的焊接材料消耗国。
Along with the progress of MAG equipment, process and welding materials at home and abroad, the situation has been improved.
随着国内外MAG焊设备、工艺和焊接材料的技术进步，这一局面正在得到改观。
So the paper summarizes the latest technological progress of pipeline underwater welding and points out its development tendency in the future.
综述了水下管道焊接技术研究与应用的最新进展，并就水下焊接技术的发展趋势提出了看法。
The present paper introduces the progress in research of welding joint properties and welding consumables of P92 steel.
综述了P92钢焊接接头性能及其焊接材料的研究进展。
QUAN Ya-jie. Research status and development trends of laser welding of magnesium alloy[J]. Laser and Optoelectronics Progress, 2012, (5):5-15.
[10] 全亚杰。镁合金激光焊的研究现状及发展趋势[J]。激光与光电子学进展， 2012， （5）：5-15。
QUAN Ya-jie. Research status and development trends of laser welding of magnesium alloy[J]. Laser and Optoelectronics Progress, 2012, (5):5-15.
[10] 全亚杰。镁合金激光焊的研究现状及发展趋势[J]。激光与光电子学进展， 2012， （5）：5-15。
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