The repair welding method comprises the following steps: firstly, preparing a protectant for repair welding and deposited metals according to material compositions of a large forgedpiece;
本发明的补焊方法，包括以下步骤：首先根据大型锻件的材质成分，制备补焊用保护剂和熔敷金属；
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In a 100-year-old workshop in the centre of Berlin stands a gleaming piece of forged metal, four storeys high.