Ikpe
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Ngwa Ngwa nke Osisi Ọgwụgwọ Gas na Changqing Oilfield
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Okwu ngwa netwọkụ mmiri ozuzo na Chongqing
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Okwu Ngwa nke Osisi Mmepụta Gas na Changqing Oilfield
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Mmiri mmiri ozuzo Pipe Network Project na Jiaxing
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Ngwa nke ọrụ mmiri na Jilin
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Ngwa nke Chlorine fọdụrụnụ na mmiri ọñụụ na America
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Ngwa maka ọdọ mmiri igwu mmiri na Urumqi, Xinjiang
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Okwu Ngwa nke Igwe ọkụ ọkụ n'ime ụlọ na Beijing
