发布时间:2025-02-09 05:00:35
这是个公共广播系统用的喇叭,连接线间变压器的黑、红、白3根线,对应的应该是70V和100V(或110V),具体是多少,你可看看接线柱旁边有没有标注,或看看喇叭的使用说明书,然后根据你的扩音机的输出是多少,选择用哪组即可。
我家大门南方向门前有条丁字路丁字路有一半对准我家大门请问一下好还是不好
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