亚洲一久久久久久久久,国产精品无打码在线播放,无码精品久久久久久人妻中字,亚洲一区爱区精品无码

Product features

1. Material: 38CrMoAlA

Nitriding treatment: Surface hardness: HV≥900

Nitriding depth: 0.5-0.8mm


2, material: special stainless steel,

Quenched, hard HRC55-58, suitable for all kinds of transparent and corrosive materials, improve the life of screw.


3, material: surface tungsten carbide ultra sound overall spray welding, improve the wear resistance of screw.


Injection screw - Screw barrel of injection molding machine

1. Material: 38CrMoAlA

Nitriding treatment: Surface hardness: HV≥900

Nitriding depth: 0.5-0.8mm


2, material: special stainless steel,

Quenched, hard HRC55-58, suitable for all kinds of transparent and corrosive materials, improve the life of screw.


3, material: surface tungsten carbide ultra sound overall spray welding, improve the wear resistance of screw.


搡老熟女国产| 国产精品揄拍100视频| 被男人吃奶跟添下面特舒服| 色综合 图片区 小说区| 亚洲AV无码第一区二区三区| 国产成人精品无码片区|