High X-ray doses prescribed for radiosurgery must be delivered with sub-millimetre precision to avoid damaging nearby organs and healthy tissue.
放射外科所用高能X射线必须提供毫米以下精度的能量传输才能避免损伤周围器官和健康组织。
Furthermore, the reducer is turned on at the prescribed degree, thereby circling the little refrigerant to the indoor heat exchanger so as to improve the precision of judging the finish of defrost.
另外，使减压器以规定开度打开，使极少的制冷剂向室内热交换器循环，从而可提高除霜结束判定的精度。
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