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Metal air duct connecting device
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Temporary operation platform system and construction method thereof
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A kind of steel construction part bending auxiliary device and its application method
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A kind of high-precision promotes synchronous simple system of measuring and its measurement method
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A kind of concrete filled steel tube pours exhaust apparatus and its construction method
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A kind of ellipse semi-automatic blanking and groove cut-off apparatus and application method
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A kind of air-conditioning system and control method suitable for High aititude region
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A kind of decoration cellular board upside-down mounting plug in construction and its construction method
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A kind of parallel trussed roof of large span gradual change polygonal cross-section and construction method
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A kind of parallel space truss of large span polygon variable cross-section and construction method
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Truss structure and its installation method are reinforced in a kind of recessed fish-bellied type combination of large span
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