求大佬解答 接收机
接收机怎么看正负极啊,求大佬详细解答https://app.rcfans.com/public/emotion/face_012.pnghttp://image.rcfans.com/pic/20210818/1629265251294271_51.jpg?x-oss-process=image/watermark,image_cGljLzIwMjAwNzIxL29zc18xNTk1MzM4ODExNTY2XzIzMl8xMThfMzI2LnBuZw==,t_50,g_se,x_20,y_20
中间正右边负
看那个图标,那不是有加减号和一个波形图标嘛
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