欧美精品黑人猛交高潮,久久久国产99久久国产久,免费 无码 国产在线91下载,国产三级aⅴ视频在线观看,AV人妻九七无码婷婷,精品无码中文字幕在线,2011亚洲人妻影院免费,中文字幕日韩熟妇无码,免费无码国产永久入口

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