BEIJING, Aug. 20 (Xinhua) -- Chinese astronauts Nie Haisheng and Liu Boming both slipped out of the space station core module Tianhe on Friday morning to conduct extravehicular activities for a second time, according to the China Manned Space Agency.
 
                 
                                
 
            
         
            
         
                
             
     
							 
			 
			 
                             
                         
                         
                         
                         
                         
                    
 
         
               
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