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Tunneling machine for non-open cut type to install excavation device
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Tunneling machine for non-open cut type tunnel pressing of excavator connection form
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The front structure for non-open cut type tunnel pressing
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The front structure for constructing non-excavation type tunnel structure
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Method for constructing tunnel by using pipe
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Roll type roof construction and non open cut tunneling method thereof
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Precast box equipped with plate for decreasing friction and non open cut tunneling method thereof
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Fender for protection wall
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Replaceable expansion and contraction joint stracture for use in bridge and Method for use the same in brige
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