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Prestressed combined steel pipe support
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Regular splayed bracing support truss steel support
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Large-span regular splayed prestressed truss steel support
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Transverse oblique connection truss support structure assembly
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Prestress control locking device
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Prestressed truss steel support system
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Assembled in foundation pit compensates bracing members
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Mechanical lock movable end
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Automatically control the self-locking jack of bit shift compensation section
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The combination Circular Steel Support structure of axle power command displacement
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Adjustable support rigidity pre-loaded support struts structure
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Improved hybrid precast formula support device in foundation pit
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Lenticular balance beam section steel supporting system
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Splayed diagonal bracing type steel bracing system of foundation pit enclosure wall
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Lenticular balance beam enabling balance force to be uniformly distributed and design method thereof
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