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

        Specification: Φ 15 - Φ 350

        Maximum length: less than 10000mm

        Nitriding treatment, surface hardness: HV≥900

        Nitriding depth: 0.5-0.8mm


        2, material: surface WC/Co overall spray welding, can effectively improve the service life of screw


        Extrusion screw - Granulation screw

        Specification: Φ 15 - Φ 350

        Maximum length: less than 10000mm

        Nitriding treatment, surface hardness: HV≥900

        Nitriding depth: 0.5-0.8mm


        2, material: surface WC/Co overall spray welding, can effectively improve the service life of screw