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换土法
bridg.constr.	cut and replacement method
hydroel.st.	soil replacement method
tech.	cut-and-replacement; remove-and-replace method; soil change method
换土法地基处理的
hydroel.st.	replacement method
换土施工法
tech.	replacement method
软基处理换土法
el.	excavation and replacement
地基处理换土法
eng.geol.	replacement method

换土 法: 5 phrases in 4 subjects

Bridge construction	1
Engineering geology	1
Rail transport	1
Technology	2