twin screw and barrel, conical twin screw barrel,screw barrel
| Type of posting | Offer |
| Category | Other Welding & Soldering Supplies |
| City / Port | Beijing, CN, China |
| Description | twin screw and barrel. twin screw and barrel Techinical parameter: 1 depth of nitration layer :0.5-0.8mm 2 hardness of nitration900-1000HV 3 fragility of nitration: less than grade 1 4 roughness of the surface: Ra 0.4 5 straightness of the screw: 0.015mm 6 surface hardness of nitrated Cr coating layer: ≥950HV 7 the thickness of chrome-plating layer; 0.025-0.085mm |
| Date | 2009 Dec 12, 04:12 |