Dac diem hien tuong bien dang lun be mat do bom hut nuoc duoi dat o Ha Noi (The characters of the land-subsidence caused by withdrawal of ground water in Hanoi)
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Dac diem hien tuong bien dang lun be mat do bom hut nuoc duoi dat o Ha Noi (The characters of the land-subsidence caused by withdrawal of ground water in Hanoi)