History, 30.01.2020 22:58 javonteoshamccaliste
The dragon backbone pump was invented during the song dynasty. what does a dragon backbone pump do?
a.
doctors treat bone illnesses
b.
pump water out of flooded boats
c.
allows one man to scoop water from one place and dump it into an irrigation canal
d.
automatically pumps arrows through a long tube
Answers: 1
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