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电磁推进
 电磁推进
space electromagnetic propulsion
| 潜艇
 潜 艇
gen. submarine
 潜艇
gen. dunker; tin can
environ. submarine
space subsurface ship

to phrases
电磁推进
space electromagnetic propulsion
电磁推进: 11 phrases in 2 subjects
Nautical2
Shipbuilding9