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sand drain
bridg.constr. 排水砂井; 砂井
ecol. 排水砂桩
eng.geol. 排水砂樁
hydroel.st. 砂井排水; 填沙排水井
tech. 砂井 (渗水暗沟); 砂桩; 砂柱
sand drain: 27 phrases in 4 subjects
Bridge construction4
Construction2
Engineering geology4
Technology17