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                 Invention patent for radial vibration centrifugal casting method 
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                 Invention patent of axial vibration centrifugal casting method 
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                 Invention patent for centrifugal production method of bimetallic tube billet 
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                 304L-SA210 bimetal hot rolling tube blank production method invention patent 
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                 Invention patent for thin-wall bimetallic tube centrifugal production method 
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                 Invention patent for furnace tube rotary and intermittent feeding type display frame 
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                 Invention patent for furnace tube welding centering and gas protection device 
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                 Invention patent for a new type of centrifugal casting tube die end cover fixing device 
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                 Horizontal centrifugal casting machine invention patent 
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                 Invention patent for heat-resistant steel and preparation method thereof 
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                 Invention patent for naphtha preparation of low carbon olefin 
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                 Invention patent for centrifugal casting furnace tube and preparation process thereof