About Li Yonglong
About 中国鉄建港航局集団有限公司第一工程分公司 广東广州 511442
About Tiedao Jianzhujishu
About shock(mechanics)
About hydraulic pressure
About economy(efficiency)
About steel
About expressway
About construction work
About ground subsidence
About static pressure
About karst landform
About foundation work
About buried work
About drilling(cutting)
About sleeve
About borehole
About economic effect
About Piles,pile foundations,sheet pile foundations
About カルスト
About 地域
About 掘削穴
About スリーブ
About 設計
About 施工
About 研究