PREVIEW
... ute very late. Since the return time was too late, Su Yan complained to Qu Mao for a long time, so that Qu Mao had to exercise overload , interacted with Su Yan several times.
The reason why he came back so late is that since noon, Qu Mao organized Kong Ming, Bi Sheng and Yan Qisheng to discuss the improvement of the steam engine in the laboratory where the neat engine prototype was located, and also sketched a large number of original design drawings .
The whole technical discus ...
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