www.91在线播放,中文字幕亚洲高清在线一区,美女极度色诱视频国产WWW,国产精品久久久久久久福利,日韩a一级欧美一级,亚洲 综合 校园 欧美 制服,67pao国产成视频永久免费,妺妺窝人体色WWW在线一 







   

   
   
Service Hotline
086-577-86923687

   









	

    	
        

    





 

  
  
  
  

  

 






        
        
        

            
        












Current Location:Home - News - Products Knowledge







            

                
            










        
Comparison Process head cold and hot processing

          
Release Time:2011-10-26  Views :  
                    

         
Processing head is generally divided into cold and hot working are two, compare the following three aspects of the two paper processing head were:


 


A, head cold material deterioration does not occur, especially suitable for processing stainless steel head;


Thermal processing material deterioration will occur, resulting in decreased corrosion resistance of stainless steel head, stainless steel head is not suitable for processing.


B, cold will not change the size of the contraction caused by cooling, regular shape, size, accuracy and consistency;


Hot forming mold can cause thermal expansion and contraction of the cooling head, the size difference is difficult to control and consistency.


C, to maintain the surface after head cold forming smooth surface of the original material, beautiful appearance.


Surface oxide formed after thermal processing head of serious and difficult to remove.





   

      
         

            
Key Words : 不銹鋼封頭

            
        

        
      

     
        
   

  
   

        
Products

        


         

         
          

		    
Elliptical head

		    
Elliptical head

	    

                
            
          

		    
Butterfly head

		    
Butterfly head

	    

                
            
          

		    
Spherical head spin edge

		    
Spherical head spin edge

	    

                
            
          

		    
Flat Head

		    
Flat Head

	    

                
            
          

		    
Spherical head

		    
Spherical head

	    

                
            
          

		    
Bow bottom head

		    
Bow bottom head

	    

                
            
          

		    
Conical head

		    
Conical head

	    

                
            
          

		    
Spherical cap shaped head

		    
Spherical cap shaped head

	    

                
            
          

		    
Insulation panel

		    
Insulation panel

	    

                
            
          

		    
Expansion Joints

		    
Expansion Joints

	    

                
            
          

		    
Jacket (cylinder) rotation side

		    
Jacket (cylinder) rotation side

	    

                
            
          

		    
Manhole flange

		    
Manhole flange

	    

                
            
         

         
    




  
   

   
   
   
   
   
   















  

    

      NAVIGATION
    

    
  


  

    

    

      
      

        Wenzhou Shangshang Metal Products Co., Ltd. 

        Add : 208,Zhanhong Road,Dushan,Longwan CentralIndustry,Wenzhou

        Tel : 086-577-86923687 85981288    Fax : 086-577-86913687

        All Rights Reserved © 2016 Wenzhou Shangshang Metal Products Co., Ltd    Zhejiang ICP No. 08,005,782
        
      




    
	
  • Follow Us
    Follow Us
    • 












    



  











主站蜘蛛池模板：
粉色视频免费观看完整版|
成全电影大全在线观看第二季|
棚户区小伙嫖老妓女|
日本xxxb孕交|
姐姐6电视剧在线观看|
国产偷国产偷亚洲高清人|
亚洲成av人片在线观看无码|
国产在线拍揄自揄拍无码视频|
性饥渴艳妇性色生活片在线播放|
无码精油按摩潮喷在播放|
婷婷涩涩五月天综合蜜桃|
三级 亚洲 欧美|
西西午夜无码大胆啪啪国模|
国产jjizz女人多水喷水|
极品少妇被后入内射视|
好深好爽办公室做视频|
邹城市|
激情内射人妻1区2区3区|
久久久噜噜噜久久熟女色|
亚洲日本va中文字幕|
镇平县|
国产高清不卡免费视频|
安泽县|
果冻传媒九一制片厂|
黄平县|
老女人做爰全过程免费的视频|
亚洲国产最大av|
成人欧美尽粗二区三区av|
精品97国产免费人成视频|
男男freegayvideosxxxx|
樱花草在线社区www中国中文|
欧美影院|
荥阳市|
av人妻|
好男人在线观看免费视频|
欧美变态另类z0z0禽交|
肥大bbwbbw高潮抽搐|
赞皇县|
天天躁夜夜躁狠狠综合|
日本高清免费毛片久久|
搡bbb搡bbbb搡bbbb|