精品熟女视频一区二区三区,91色在色在线播放,五月天婷婷综合久久,久热中文字字幕在线

      

    1. 

        
    
        
    
        
        
        
        
        
    
        
    

        

    
        
        

        
        

            
        
                
        
                
        

                
                

                
        
                    
        Product features
        
                    
        The melting process of the material is optimized, so as to increase the extrusion yield and realize the extrusion of the material melt at a lower temperature.
        Good homogenization of the material is achieved by the specific shear action in the isolation gap.
        The melt plasticization process is controlled, meaning that only particles smaller than the isolation gap can enter the melt channel.

        
                
        
                
        
            
        

            
        
                
        
                    
        Extrusion screw - Pipe screw
        
                
        
                
                
        
                
        
                    
        
                        
        Material: 38 crmoala
        Process: nitriding and bimetallic
        Nitriding depth: 0.5mm-0.7mm
        Bimetallic screw: alloy layer hardness HRC>60
        Nitriding layer hardness: HV960-1100
        Alloy layer depth: 2~2.5
        Screw straightness: 0.015mm
        Chrome plated screw: Chromium layer thickness: 0.03-0.06mm
        Surface finish: 0.04Ra/um~0.08Ra/um
        Nitride brittleness: less than grade 2
        Aspect ratio: 1: (33~42)