It has ending arcfunction, after the welding of thick welding wire, loosing sensitive switch, the voltage of arc and welding torch.
设有收弧功能，粗焊丝焊接后，松开枪头微动开关，送丝与电弧电压自动衰减填满弧坑。
2
With a seal, thermal insulation, sound insulation, fire protection, anti-static, anti ultraviolet radiation, anti arc, dustproof, mothproof, anti impact function.
具有密封、保温、隔音、防火、防静电、防紫外线、防弧光、防尘、防虫、防冲击等功能。
3
Conclusion The length of the femur medullary cavity, the form of narrow part and the arc were exerting the conditionality function for designing and applying the Chinese intramedullary nail fixation.