2. 

  2. <th id="o49ir"><object id="o49ir"><acronym id="o49ir"></acronym></object></th>
    <ul id="o49ir"><noscript id="o49ir"></noscript></ul>
  3. 

    1. 


 





		

		
      
			
      

				
      
					
					
      

						
      
							
							

							
      


								

								 
								
								

							 


								




							
      
						
      

						

						

						
						
						


					
      

				
      

			
      

		
      


		

		
		
		





		


		
      
			
			
      
				Home
				
				News & Events
				
				Recent News
			
      
			
      
				
      
					
      News & Events
      
					
      Insist on innovation and development, and listen to insights and voices from various technical fields around the world.
      
				
      
			
      
		
      
		
		
      
			
      
				 				  
				 				 
      Recent News
             
				  
				 				 
      Marketing Event
             
				 				 
      Media Interaction
             
			
      

			

			
			
      
				
								
					
      
						
      
						
      
							2021-09-18
							
      DDTOP Inspection and Maintenance
      
							
      On August 27, 2021, China National Petroleum Corporation Fushun Petrochemical Co…
      
						
      
					
      
				      
								
					
      
						
      
						
      
							2021-09-18
							
      DDTOP Group Was Selected As One of the “2021 Standardized Good Behavior Enterprises” List
      
							
      Recently, Liaoning Provincial Market Supervision Administration released the …
      
						
      
					
      
				      
								
					
      
						
      
						
      
							2021-09-15
							
      Great Success for Overseas Business Department-A Big Order from Schlumberger
      
							
      In August 2021, the Overseas Business Department successfully won its first orde…
      
						
      
					
      
				      
								
					
      
						
      
						
      
							2021-09-15
							
      Technical Exchange and Communication Activity between Liaohe Oilfield and DDTOP
      
							
      On August 27, 2021, the Northwest Region of DDTOP marketing center organized a s…
      
						
      
					
      
				      
								
					
      
						
      
						
      
							2021-09-10
							
      DDTOP is awarded the Title of National Specialized and New “Small Giant” Enterprise
      
							
      Recently, the Ministry of Industry and Information Technology announced the list…
      
						
      
					
      
				      
								
					
      
						
      
						
      
							2021-09-10
							
      DDTOP Becomes the First Batch of Strategic Alliance of Industry-College-Institute Enterprise
      
							
      In March 2021, Liaoning Provincial Department of Science and Technology issued &…
      
						
      
					
      
				      
				
			
      
			
      
				
				
				
      
			
			
		
      
		
		
		 



	
		
		
		
		








      您的瀏覽器當(dāng)前寬度低于1100px;請使用1300px以上寬度訪問。
      

 







av片在线免费,欧美日韩旡码中文字幕,中文字幕高清无码在,免费在线看中国AV


        2. 

      2. <th id="o49ir"><object id="o49ir"><acronym id="o49ir"></acronym></object></th>
        <ul id="o49ir"><noscript id="o49ir"></noscript></ul>
      3. 

        1.