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              Lesson 1 Introduction to processing of base
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                      4.1.1 The definition and classification of baseThe name is derived from English BASE,which means the substrate,base fabric and semifinished products. The synthetic leather base usually refers to fiber-resin composite which isformed by the impregnating or ......（本文共 7537 字）      [閱讀本文] >> 
               
			  
				 
              
				 
				
				
              
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