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vacuum breaking
 vacuum breaking
el. 破坏真空
| valve
 valve
hydroel.st. 活门; 电子管; 真空管
space 排气阀; 通气阀门;
sport, bask. 球嘴
tech.

to phrases
vacuum breaking
el. 破坏真空
tech. 真空破坏
vacuum breaking: 6 phrases in 5 subjects
Automobiles1
Construction1
Electronics2
Nautical1
Technology1