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平均海平面
agric. sea datum
tech. mean sea level; mean level of the sea
平均海平面: 60 phrases in 16 subjects
Aviation2
Bridge construction1
Drilling1
Earth sciences6
Electronics1
Engineering geology2
General1
Geology4
Geophysics4
Hydroelectric power stations1
Navigation4
Oil / petroleum1
Shipbuilding1
Space1
Technology29
Water resources1