Ndekọ mbupu taa nke EHUG grooved U-Flex dị ka n'okpuru: A na-eji ya amịkọrọ mmegharị nke ndakpọ na ịda mbà n'obi nwere ike ịkpata karịsịa ebe mmegharị seismic nwere ike ịkpata nsonaazụ dị egwu. Oge nzipu: Ọgọst-18-2022