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variable depth | sonar
 sonar
compr. 水声测位仪
hydroel.st. 声纳
met. 声波定位仪; 水声探测器
oil 声呐

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Variable Depth
mil., abbr. VD
variable depth: 25 phrases in 12 subjects
Agriculture3
Aviation1
Earth sciences1
Electronics2
General1
Geophysics1
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Navigation3
Oil / petroleum1
Plastics1
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Technology9