1. <small id="vlp1h"><tbody id="vlp1h"></tbody></small>
        

        

        
上海少妇高潮狂叫喷水了,任我爽精品视频在线观看,精品一区精品二区制服,国产欧美高清在线观看,国色精品无码专区在线不卡,(无码视频)在线观看,亚洲中文有码字幕青青,日韩国产高清一区二区 





        
    
        
        
        
            
        
            
            
        
                
                
                
         
                     
                
        
            
        
            
         
                                
            
        
        
        
    
        
    
        
        

            
        
        
         
            
        PTFE6 (polytetrafluoroethylene balls)
        
    
        
        
         PRODUCTS > PLASTIC BALLS > PTFE6 (polytetrafluoroethylene balls) 
        
        
        
            
        
                
        PTFE6 (polytetrafluoroethylene balls)
        
            
        
            
            
        
                
        
    
        
                    
          
                                    
          • 
                            
        
            
        
    

        
     
     
     
     
            
        
            
        
                
        
                    
        
                        
        
                                            
        
                
        
                
        
                    
        
                                                                                            
        
                                    
        
                            
        
            
        
        
        
    
        
    
        
        
        
            

        
                                        


         

         
         
         

         
         
         
         

        		PTFE6 (polytetrafluoroethylene balls)
        PTFE balls (PTFE6) are widely used in chemical pumps, oilfield pumps, nuclear power, aerospace, military, and other products.
         Characteristics: PTFE is a white opaque waxy powder with a density of 2.14~2.20g./cm3.
        Features: It is heat-resistant—usable at temperatures ranging from 200 to 260 degrees Celsius, cold-resistant—remains flexible at -100 degrees Celsius; corrosion-resistant—resistant to aqua
regia and all organic solvents; weather-resistant—has the best aging resistance among plastics;
high lubricity — has the lowest friction coefficient (0.04) among plastics; non-stick — has the
lowest surface tension among solid materials and does not adhere to any substance; non-toxic—
has physiological inertness.
        Precision Grade:G0—G4
        Specifications:1mm—60mm
        
                        
                
        
    
        
    
        
        
        
                                
        
    
        

        


         
        
        
    
        
    

        


        










 





 

 



主站蜘蛛池模板：
亚洲精品国产一区黑色丝袜|
成人午夜福利视频|
高清人人天天夜夜曰狠狠狠狠|
欧美精品色婷婷五月综合|
麻豆精品偷拍人妻在线网址|
欧美白丰满老太aaa片|
久久精品99av高久久精品|
人人妻人人澡人人爽精品日本|
亚洲爆乳精品无码一区二区三区
|
亚洲欧美日本韩国|
国产精品人成视频免费vod|
国产精品视频一区二区三区不卡|
国产成人av无码永久免费一线天|
日本三线免费视频观看|
7777精品伊久久久大香线蕉|
伊人蕉久中文字幕无码专区|
国内精品久久久久影院蜜芽|
在线看免费无码av天堂|
高清人人天天夜夜曰狠狠狠狠|
欧美69久成人做爰视频|
婷婷亚洲久悠悠色悠在线播放|
久久香蕉综合色一综合色88|
亚洲爆乳精品无码一区二区三区
|
国产自在自线午夜精品|
少妇被粗大的猛进69视频|
一二三四视频社区在线|
国产成人av无码永久免费一线天|
成人片国产精品亚洲|
亚洲国产精品久久久久久久|
国产欧美国日产在线播放|
国产女精品视频网站免费|
国产无套一区二区三区浪潮
|
久久久久琪琪去精品色无码|
国产亚洲精品久久久久秋
|
精品国产乱码久久久久久浪潮小说|
亚洲色成人一区二区三区|
欧美69久成人做爰视频|
国产夫妇肉麻对白|
韩国的无码av看免费大片在线|
亚洲色大成网站www永久男同|
国产精品a久久777777|