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          polypropylene
          
	        	
                 Data：2020-05-07 11:44:17
          
	        	
          
 	        		
           polypropylene/PP, usded as the raw material of disposable surgical mask
          
 
 
	        	
          
	         
	        
          
		    
          
		
          

 
 
          
 
          
  
          
    
    
    

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