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水准原点
bridg.constr.
original bench mark
space
basic leveling origin
;
leveling origin
tech.
basic levelling origin
;
datum mark of leveling
;
datum mark of levelling
;
levelling origin
;
original benchmark
水准原点
国家高程控制网的起算点。我国水准原点设在青岛
expl.
leveling origin
水准 原点
:
3 phrases
in 1 subject
Technology
3
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