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飞利浦ＳＬ７５ -１４型直线加速器有４组聚焦电源给１２个聚焦线圈供电 ,每个电源都装有保护线圈 ,检测电源电流是否过高或过低 ,并在上述情况下封闭脉冲重复频率（Ｐ．Ｒ．Ｆ．） ,使加速器无输出。并且 ,在监测控制柜（Ｍ．Ｃ．Ｃ）面板上有各组电源电流指示表和专门的聚焦?
Philips SL75-14 linear accelerator has 4 sets of focusing power supply to 12 focusing coils. Each power supply is equipped with a protection coil to detect whether the power supply current is too high or too low and closes the pulse repetition frequency in the above case (P. R.F.) so that the accelerator has no output. And, in the monitoring and control cabinet (M.C.C) panel, there are various sets of supply current indication tables and special focus?