Nnukwu ibu ụgbọ mmiri

Beijing adịgide ọkpọkọ njikọ eji na nnukwu ibu ụgbọ mmiri

:Dị: Nnukwu ibu ụgbọ mmiri

Usoro ngwa : Bilge mmiri, mmiri ballast, sistemụ ọkụ ọkụ, sistemụ eriri igwe na ihe ndị ọzọ.

 

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