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2021
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Invention
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Hollow-hole burn cut three-time blasting method. Disclosed in the present invention is a hollow-h... |
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2020
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Invention
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Method of treating tunnel collapse using pavilion support. A method of treating tunnel collapse i... |
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Invention
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Method of treating tunnel collapse with roof-contacted shield support. A method of treating tunne... |
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Invention
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Method for treating tunnel collapse by using pavilion-type support. A method for treating tunnel ... |
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Invention
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Method for treating tunnel collapse by using roof-contacted shield plate support. A method for tr... |
