「シンクホールは人災?」2年前の報告書でも「地盤沈下危険度4級」=韓国
”Are sinkholes man-made disasters?” A report from two years ago also puts land subsidence risk at level 4 = South Korea
It has been confirmed that the area where a large sinkhole occurred, which led to the death of a motorbike driver in his 30s in South Korea, was also identified as a region requiring attention in a Seoul city utility report two years ago.
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