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Tunnel Construction
1672-741X
1990 Issue 2
gang xing feng guan lou feng lv liang ce ji shu
lu mao cheng ;
..............page:49-54
511 li xi fei bing diao cha bao gao
tu ze hua ;
..............page:55-58
guan yu zhao qi ceng zhuang ji ju de xing cheng
zhang guo yun ;
..............page:59-61