<nav id="yyyyy"><sup id="yyyyy"></sup></nav>
  • 

    

  • 
性做久久久久久久免费观看
,亚洲瑟瑟瑟,精品一精品国产一级毛片,欧美自拍另类欧美综合图片区,国产XXXX,中日韩一级片,国产内射视频在线播放,亚洲婷婷综合中文字幕第一页 






    
   
    
   
   
    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：
99在线观看免费视频|
99re热这里只有精品18|
中文字幕永久免费观看|
夫妻一起自拍内射小视频|
亚洲AV无码不卡国产精品|
精东无码|
日韩一区中文字幕在线|
www污|
国产亚洲一本大道中文在线|
国产亚洲精品aa在线观看|
亚洲国产在一区二区三区|
中文字幕在线人妻视频|
亚洲中文字幕无码一区二区三区|
久久深夜福利|
一本无码AV中文出轨人妻
|
18禁无遮挡啪啪无码网站|
国产精品无打码在线播放|
稷山县|
AV制服丝袜白丝国产网站|
中文字幕一区二区三区在线毛片|
日韩一级av一区二区|
国产又色又爽又黄的网站免费
|
国产实拍强伦奸在线观看|
91精品啪国产在线观看免费牛牛|
最新国产一区二区精品久久|
女人zozozo禽交高潮喷水|
色呦呦手机在线精品|
岛国av在线|
男女肉粗暴进入120秒视频|
久久99精品国产免费观观|
在线中文字幕日韩欧美|
5555国产在线观看精品|
一本久道久久综合多人|
亚洲一区二区三区在线播放|
国产人禽杂交18禁网站|
XXXX国产|
国产日韩精品视频一区|
欧美激情综合色综合啪啪五月|
无码国产精品一区二区免费虚拟VR
|
国产福利影院|
成人福利一区二区视频在线|