发布时间:2025-02-05 17:37:37
线电流。额定电流是指用电设备在额定电压下,按照额定功率运行时的电流,对于三相变压器,额定电流就是指线电流。三相变压器是用于精密机床等的电子配件。
请问草图大师2013序列号是什么sketchup2013序列号哪里有
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