dynamo ,electric (excl. those for internal combustion engines, for lighting or signaling equipment of cycles or motor vehicles, or high tension generators), direct current of an output exceeding 37.5w是什么意思_dynamo ,electric (excl. those for internal combustion engines, for lighting or signaling equipment of cycles or motor vehicles, or high tension generators), direct current of an output exceeding 37.5w在线翻译_英语_读音_用法_例句