纵向焊接 longitudinal welding 纵置汽包锅炉 longitudinal-drum boiler 纵向焊接的包壳管 longitudinally welded clad(ding) tube ..
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longitudinal drum boiler [动力] 纵汽包锅炉
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Because of the much thick wall of large capacity boiler drum, the pressed and weld longitudinal seam is used to manufacture the drum shell ring.
由于大容量电站锅炉汽包的壁较厚，所以在汽包筒节制造时常采用压制成两个半圆瓦片再焊接而成的方法。
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