Engineering seismic investigation in city is limited by ground and conditions of seismic environment it is worked very difficult.
城市工程地震勘察因场地及地震环境条件的限制，其施工难度大。
Engineering seismic investigation in city is limited by ground and conditions of seismic environment it is worked very difficult.
城市工程地震勘察因场地及地震环境条件的限制，其施工难度大。
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