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声波波形
geophys. sonic wave form
oil acoustic signature
space acoustic mode
声波波形: 41 phrases in 12 subjects
Architecture1
Aviation1
Drilling1
Earth sciences3
Explosives and Explosive Ordnance Disposal1
Fishery fishing industry1
Geophysics10
Information technology1
Metallurgy2
Oil / petroleum6
Technology12
Telecommunications2