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一 .ss.中的自I二!1二I【松I【瞩卜光1动对时装置,往往达不到规范的要求,原——————————因有以下几方面:(以DF一九七九年世界Ms≥6级地震目录
One. Ss. Since I II! 1 II I [Song I [light Buchi light 1 dynamic device, often fail to meet the requirements of the standard, the original ---------- because of the following aspects (By DF1979 world Ms ≥ 6 earthquake catalog