Let’s Not Screw Up Fair Park

Over at the DMN, there’s an op-ed (or whatever you’d call it online) that is worth your time. A woman named Tammy Johnston, chair of the South Boulevard-Park Row Historic Neighborhood Association, explains why she doesn’t like the looks of the latest effort to re-imagine Fair Park. Johnston says: Dallas is in the process of […]

Conical Twin Screws and Barrel

1, Material: 38CrMoAl A nitrogen treatment, the surface hardness: HV ¡Ý 900 nitrided layer depth :0.5-0 .8 mm 2, material; substrate 38CrMoAl A, Lo edge surface of a dual alloy casting welding, effectively improve the life of the screw 3, Material: substrate 38CrMoAl A, Liu Hau Yi wear part is imported alloy steel, after special […]

Conical Twin Screws

1, Material: 38CrMoAl A nitrogen treatment, the surface hardness: HV ¡Ý 900 nitrided layer depth :0.5-0 .8 mm 2, material; substrate 38CrMoAl A, Lo edge surface of a dual alloy casting welding, effectively improve the life of the screw 3, Material: substrate 38CrMoAl A, Liu Hau Yi wear part is imported alloy steel, after special […]