phaseangle of a current transformer
电流互感器的相角差
Reerseangled curettes and a burr were used to create a foraminotomy at S2, which allowed the S1 and S2 nere roots to be mobilized.
用反角刮匙和电钻行骶2神经孔切开术, 松解骶1, 骶2神经根。
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