Extravehicular Activity                            
                            
                                Activities by crew members conducted outside the pressurized hull of a spacecraft.
                                
                            
                                推出的年份: 1995                            
                                                                                        
                            
                            
                                                                树号: J01.937.285.850.400                            
                            
                                MeSH 单一 ID: D018478                            
                                                                                        
                                    进入的组:
                                    
                                                                                    - Activity, Extravehicular
 
                                                                                    - EVA
 
                                                                                    - Space-Walk
 
                                                                                    - Space Walk
 
                                                                                    - Space-Walks
 
                                                                            
                                 
                            
                                                                                        
                                    早前的内容:
                                    
                                                                                    - Extraterrestrial Environment (1966-1994)
 
                                                                                    - Space Flight (1966-1994)
 
                                                                            
                                 
                            
                                                                                                    
                                                            
                            
                            
                         
                                                                                                
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