分别从材质、结构、焊接方式上进行了分析，从而找出其中的原因及解决办法。
The paper analyses the reason of leakage based on material, struction and welding of tube bundle, and gives some solution methods.
通过简单分析该主电路的结构形式和工作原理，证明它是一种对电网污染少、整流输出电压特性好的焊接电源主电路形式。
By analyzing its structure and working principle, it proves that the new circuit has little pollution to the network and has well characteristic of the output voltage.
针对管-管节点的几何特征，分析了声波在钢管焊接结构中的传播规律。
It analyzed the transmission rule of sound wave in steel tubular welding construction aims at the geometry of tube-tube joints.
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