韩国新闻媒体报道说，为了阻挠电话通信安装了干扰设备。
The South Korean press reported that jamming devices were installed to obstruct cell phone communications.
两年前，一些激进分子开始在谷歌及其他技术公司的班车穿过旧金山狭窄的街道时，进行阻挠和干扰。
Two years ago, radicals began delaying and harassing Google and other tech companies' shuttles as they threaded San Francisco's narrow streets.
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