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■ Beryllium copper alloy and Aluminum bronze material
■ JB/T 7334
■ Die forged
■ The simple lifting machine, used for lifting or lowering heavy loads.
| Number | Capacity T | I-Beam Width mm | Weight kg |
| 307D-1002 | 0.5 | 68-94 | 25 |
| 307D-1004 | 1 | 68-100 | 34.5 |
| 307D-1006 | 2 | 94-124 | 48 |
| 307D-1008 | 3 | 116-140 | 50 |
