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The NDUME turbo-pump — a user experience01.04.1992 
 New methods of pumping for different circumstances are being invented all the time. Here's one that works with a low head of water and at reduced stream flows.
 
        
        
        
            01.04.1992
            
            New methods of pumping for different circumstances are being invented all the time. Here's one that works with a low head of water and at reduced stream flows.
        
    
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