Description
| Extrusion anchorage | |
| Hardness | 60-108HRB(5-25HRC) |
| Material of extrusion sleeve | 40Cr GB/T3077-1999 or 45#GB/T699-1999 |
| Material of extrusion spring | 65MN |
| Static load test |  Anchorage efficiency coefficient ηa and ultimate total strain ε,Conform to the GB/T14370-2007 standard article 5.5.1. |








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