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gas tightness
el. 密封的
oil 不透气性
space 气密性
gas-tightness ['gæstaɪtnəs]
tech. 气密性; 不透气性; 不透气性材料
gas tightness
: 6 phrases in 5 subjects
Electronics1
Nautical1
Shipbuilding1
Space2
Technology1

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