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temporary bench mark
bridg.constr. 临时水准点
eng.geol. 临时水〔基〕准点
navig. 临时基准点
tech. 临时水准
temporary bench-mark
tech. 临时的水准基点
 English thesaurus
Temporary Bench Marks
abbr., survey. T.B.M. (http://www.levelling.uhi.ac.uk/tutorial1_9.html OLGA P.)