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							Interlock pressure reducing damper
							
      Interlock pressure reducing damper
      
						      
					
      
										
      
						
							Protective door of refuge chamber
							
      Protective door of refuge chamber
      
						      
					
      
										
      
						
							Inclined shaft explosion door
							
      Inclined shaft explosion door
      
						      
					
      
										
      
						
							Shock wave resistant valve
							
      Shock wave resistant valve
      
						      
					
      
										
      
						
							Explosion proof door of shaft
							
      Explosion proof door of shaft
      
						      
					
      
										
      
						
							Bamboo plywood non pressure damper
							
      Bamboo plywood non pressure damper
      
						      
					
      
										
      
						
							Electrically controlled pneumatic non pressure damper
							
      Electrically controlled pneumatic non pressure damper
      
						      
					
      
										
      
						
							Mining electro hydraulic automatic damper
							
      Mining electro hydraulic automatic damper
      
						      
					
      
									
      
				
							
      
		
      
	
      

      





	




  





      

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