Ngwá ọrụ ịkụcha hama kacha elu
HFD top hammer drill bitbụ tumadi ji geological exploration, coal m, mmiri conservancy na hydropower, okporo ụzọ, ụgbọ okporo ígwè, àkwà mmiri, owuwu na ewu, wdg.
HFD top hammer drill bitbụ tumadi ji geological exploration, coal m, mmiri conservancy na hydropower, okporo ụzọ, ụgbọ okporo ígwè, àkwà mmiri, owuwu na ewu, wdg.
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