Waterladder pump
![A waterladder pump](/Images/godic/202502/20/Waterladder_pump1854.JPG")
A waterladder pump, water ladder, dragon spine, dragon wheel or rahad is a low lift pump which is composed of sprockets that move a chain with paddles over a trough. Water is pumped as the paddles push the water up the trough.
Water ladder
英语百科
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- be decocted in water for oral dose
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- be deep in