（本报记者姜波、杨一、黄炜鑫、谢佳宁、赵益普、黄培昭、陈一鸣、李培松，实习生侯天泽参与采写）
They also have physical security, but those measures, including security guards, fences, video surveillance and alarm systems, are designed to keep out intruders rather than defend against missile attacks.
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Amazonが価格を大規模に操作して値段をつり上げているとして違法行為の即時停止を要求される
-80 dBm ~ 10 – 20 m