A second concave part is formed on the bottom surface of the base plate.
该基板的该底表面形成一第二凹陷部。
Based on project practice, this article analyzes the forming reason of fingernailing of tank's base plate, introduces the methods to prevent different parts of tank bottom from fingernailing.
本文根据工程实践，通过对罐底板的焊接变形形成原因的分析，介绍罐底各个不同部位焊接变形的控制方法。
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