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2022
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Invention
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Heat exchange unit comprising six rows or more of heat exchange coil tubes and vertical-closed gr... |
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2021
|
Invention
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Geothermal system comprising multitube vertically-sealed underground heat-exchanger and method fo... |
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2019
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Invention
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Geothermal system using single water supply system for heating and cooling smart farm and buildin... |
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2018
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Invention
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Shielding apparatus for high-depth groundwater well pollution prevention grouting. Disclosed is a... |
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2014
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Invention
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Shielding device and shielding method for preventing inflow of polluted upper groundwater and for... |
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2010
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Invention
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Geothermal coil pipe header device, very deep vertical closed-type ground-coupled heat exchanger ... |
