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所屬欄目：走近科學
所屬頻道：CCTV-10高清
年份：2019
展開全部
簡介：隨著城市高樓大廈的不斷增加，電梯的速度也在不斷提升。怎樣保障電梯在運行時一旦出現故障，確保乘坐人員的安全。收起
《走近科學》 20190117 電梯安全衛士（下）
《走近科學》 20190116 電梯安全衛士（上）
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