PREVIEW
... e knew of, all relying on various scientific principles. After much consideration, An Jin settled on the piston pump.
Its structure was simple, it was easy to operate, and it could be built even in the technologically backward Beast World.
The principle behind a piston pump was actually quite simple—it used atmospheric pressure to draw water upward.
She worked through the night to draft a design for a hand-cranked piston pump. It had the dual function of pumping both wate ...
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