A2 Square cone Yang coupling
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| 型号 | 材质 | 承重 |
| A2Z-S | 不锈钢/Stainless steel | 100KG |
| A2Z-T | 钛合金/Titanium alloy | 100KG |
A2Z Rotatable square conical yang coupling
A5 Yin coupling
A5Z Rotatable yin coupling
A14 Adjustable Socket Coupling