请记住，保险丝存在的理由就是作为一个安全阀门。

Remember that a fuse is an electrical safety valve that exists for a reason.

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如果灯泡烧毁，大多数设计人员都习惯于用保险丝或安全开关关闭照明器具。

Most have been used to the principle of having a fuse or safety switch that turns the fixture off if the bulb burns out.

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电源指示灯及保险丝安全装置。

Power pilot light and fuse safety protection.

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