Triangle truss and pressure circle are designed as main beating structure to increase rigidity of large diameter operation platform.
以三角桁架和压力环作为主体受力结构操作平台，解决了操作平台直径大引起的刚度不足问题。
The structure, constitute, working principle, and design feature of automatic welding system which pro- duces extra- thin, large diameter, long tube, and longitudinally or circle weld are introduced.
介绍了超薄壁，大直径，长筒体，纵、环缝自动焊接系统的结构、组成、工作原理及设计的主要特点。
Triangle truss and pressure circle are designed as main bearing structure to increase rigidity of large diameter operation platform.
以三角桁架和压力环作为主体受力结构操作平台，解决了操作平台直径大引起的刚度不足问题。
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