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Chapter 853 I am mine (first)
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"But if I remember correctly, I have read a documentary about China's construction of the African Monnet Railway. The above mentioned cement production problems. Because of the lack of raw materials, Chinese experts finally chose local volcanic ash as one of the raw materials for cement. ?"
At the time of watching this documentary, Liszt was very proud of his heart. This is a great achievement for the motherland. I remember that the cement production was made with volcanic ash. ...
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