If you are using an extensionlead it must be rated at a minimum of 5 Amps and fully unwound.
如果有使用延长电线，电线的额定电流最小达到5 Amps并且电线需完全展开。
2
The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars.
从可见光扩展到无线电波，再到 X 射线和伽马射线，天文学总是会发现不寻常的物体，如射电星系、类星体和脉冲星。
3
Staff in one hospital reported many inadvertent disconnections with a new reusable extension cable that was supposed to connect the lead to the pacemaker.