Welding is the key factor which restrict the construction speed and quality.
长输管道建设中，焊接是制约施工速度和施工质量的关键环节。
Also introduced each part's construction and function of this welding machine system.
介绍了该焊接机系统各分部的结构和功能。
Because the construction environment is very bad, the remote welding must be applied.
由于施工环境十分恶劣，必须采用遥控焊接技术。
Because the construction environment is very bad, the remote welding must be applied.
由于施工环境十分恶劣，必须采用遥控焊接技术。
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