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drilled caisson
bridg.constr. 沉井; 管柱
el. 钻孔管柱
eng.geol. 钻孔沉井; 钻孔桩
tech. 钻孔墩; 钻孔沉箱
drilled caisson
: 11 phrases in 3 subjects
Bridge construction1
Engineering geology6
Technology4