采用焊道错位叠加方法，再现了螺旋管双面埋弧焊制管过程中内、外焊焊接热影响区(HAZ)的焊接热循环。
In this paper the HAZ weld thermal cycles of the welding by both sides submerged arc welded steel pipe were reproduced by the dislocation overlap weld method.
管道系统应该满焊。法兰除了在图纸上有明确的显示外，应该不使用。
Piping systems shall be all welded. Flanges shall not be used except as specifically shown on the drawings.
超声铝丝焊接机和超声金丝球焊接机主要运用于半导体生产后工序中芯片焊盘与外框架间引线的焊接。
Ultrasonic aluminum wire bonder and ultrasonic gold wire bonder are mainly applied to joint the chip pad with the lead-frame in the later process of semiconductor producing.
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