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塌方
由于开挖卸荷或其他外界扰动下,地下工程围岩或掌子面岩体某一部分或全部发生突发性或渐进性的失稳塌落现象。
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Song Poetry School
Songpo Library
Song Qi
Song Qiqiu
Song Qishan
Song Qi’s Notes on Historical Stories
Song rules on poverty relief
Song rules on the poor's asylum
Songs
Songs about Yongzhou
Songs for the Sacrifies at the Suburban Altars
Songshan
Songshan Qu
Songshan Villa
Song Shijie
Song shipwreck at Yuanmengkou of Tianjin Jinghai
Song Shixiong
Song Shu
Song Shuhe
Song Shuhua
Song Shuxian
Songsigong Played Havoc with Zhang Who Is A Miser
song-singing or songgirl at a feast
Songs in Mountains
Songs of a Pacified Age for the Inner Halls
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