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                                    Black Corporation: Joseon - Chapter 388
                            
                                                            
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... ng-sil had produced, Hyang inwardly exclaimed.
‘Archimedes’ screw?’
Meanwhile, Jang Yeong-sil began to explain.
“As you can see, this is a modified version of the drill used for digging wells. Since the way the windmill-type propeller pushes water is similar to how a drill bores into the ground, I thought it might work with a few adjustments, so I made this.”
“That’s true, but…”
‘Is this really something that can be done with just a few adjustments?’
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