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              4.2.1 Scroll Case
               工程科技 
              
				
              

										 
                      This is an annular spiral-shaped casing forming the circumference of the turbine. Oneend of it is connected to the penstock to receive the water under pressure from it, and thiswater is admitted uniformly all over the circumference of the runner. The cros......（本文共 486 字）      [閱讀本文] >> 
               
			  
				 
              
				 
				
				
              
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