性色欲网站人妻丰满中文久久不卡
,欧美日韩在线第一页免费观看,欧美日韩久久久精品a片,亚洲成a∨人片在线观看无码
,欧洲亚洲色一区二区色99,性激烈的欧美三级视频,久久电影网午夜鲁丝片免费,在线观看免费视频污网站






        
   
        
   
   
        Service Hotline
        086-577-86923687
        
   
        

        





        
	
        
    	
        
        
    
        

        

        
 
        
  
  
  
  

  

 
        

        


        
        
        
        
        
            
        
        

        









        Current Location:Home - News - Industry News
        


        


        
            
        
                
            
        

        



        



        
        Head types and production methods
        
          
        Release Time:2011-11-23  Views :  
                    
        
         
        Category Head
        

         
        

        Head Material can be divided into: plastic, stainless steel seal top, head products are mostly male, cone shell, adjustable sections, flat lid and tightening the mouth. Wherein the convex head (sometimes referred to by the shape classification) comprising: a hemispherical head, oval head, dished head and a spherical cap-shaped head.
        

        Head of manufacturing methods
        

        a) Small head: the overall shape;
        

        b) large and medium-sized head: first splicing molding - the most widely used, mainly for the requirements of the standard in terms of it;
        

        c) large head: because of factors such as transport and open file request to split forming, after welding together.
        


        

   
        
      
         
        
            
        Key Words : 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：
五月丁香综合缴情六月小说|
国产午夜亚洲精品国产成人|
欧美日韩一区二区在线观看|
色女人网站|
日本老熟妇乱|
色妞色视频一区二区三区四区|
久久久综合九色综合|
动漫精品专区一区二区三区|
中文字幕婷婷日韩欧美亚洲|
久久日视频|
亚洲精品久久久久久婷婷|
国产在线超清日本一本|
亚洲中文一区二区|
丁香激情综合久久伊人久久|
国产欧美一区二区三区国产幕精品|
少妇无码av无码一区|
亚洲欧美成aⅴ人在线观看|
国产三级小视频|
少妇高潮大叫好爽喷水|
久久2017国产视频|
女同一区|
涩涩爱影院|
丰满少妇高潮在线播放不卡|
亚洲国产一区二区三区四区电影网
|
久久中文字幕无码中文字幕有码|
欧美性一区|
在线五月天|
精精国产xxxx视频在线|
少妇高潮惨叫久久久久久电影|
亚洲三级黄色片|
午夜福利电影|
欧美成人形色生活片|
欧美色图日韩|
97超碰人人爱香蕉精品|
国产欧美视频在线观看|
欧美性受黑人性爽|
欧美xxxxx高潮喷水麻豆|
日本高清二区视频久二区|
www五月|
国产精品免费观看色悠悠|
国产精品久久人妻互换|