安装和焊接金属部件或部分在一起，用于制造锅炉，容器，储罐，热交换器，管道和其他重金属产品。
Fit and weld metal parts or sections together to fabricate boilers, vessels, tanks, heat exchangers, piping and other heavy-metal products.
安装和焊接金属部件或部分在一起，用于制造锅炉，容器，储罐，热交换器，管道和其他重金属产品。
Fit and weld metal parts or sections together to fabricate boilers, vessels, tanks, heat exchangers, piping and other heavy-metal products.
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