| Ort der Herkunft |
Zhejiang China (Mainland) |
| Marke |
WZB |
| Modell-Nummer |
JDB-4 |
| Material |
steel |
| Geben |
Ärmel |
Can be used under low, middle and high load. Due to its superb high hardness, when under high load, it over performs than other SF-5 type. Not suitable for water, acid, ahkili circumstances. Most suitable for the supporting position of hoisting machine, e.g.bulldozer supporter, hoister supporter, reeling machine supporter etc.