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              3.2.4 The character of gradually varied flow in cross section
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											3.2.4 The character of gradually varied flow in cross section圖片（共3張） :
						
              3.2.4 The character of gradually varied flow in cross section
              
										 
                      Two important properties of gradually varied flow in cross section:(1) Flow cross-section of gradually varied flow is approximately flat. Direction ofvelocity approximately parallel to each point in cross section.(2) The hydrodynamic pressure of gradually......（本文共 908 字, 3 張圖）      [閱讀本文] >> 
               
			  
				 
              
				 
				
				
              
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