Using metal plasticity forming theory, by the technology calculation of sulfur hexafluoride breaker shell flanging, a technology calculation method was introduced about pre-punching flanging.

运用金属塑性成形原理，通过六氟化硫断路器壳体孔翻边的工艺计算，介绍了一种曲面孔翻边预冲孔的一种近似工艺计算方法。

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330 kV sulfur-hexafluoride circuit breaker.

330千伏的六氟化硫断路器。

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With sulfur hexafluoride gas to double as insulation interrupter and circuit breaker.

以六氟化硫气体进行灭弧并兼作绝缘用的断路器。

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On a slightly smaller scale, there's the huge Siemens breaker I saw at the Bonneville Power Administration. (If you're thinking of buying one as an art object, ask your dealer for a Siemens 72.5 kV SF6 sulfur hexafluoride power circuit breaker).

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