| 摘要 |
A connector for prohibiting a gas from flowing back is disclosed. The connector includes an outer housing having a gas inlet thereon; and an inner housing disposed inside the outer housing and having an annular concavity, corresponding to the gas inlet, thereon. The outer housing and the inner housing are funnel-shaped. The gas inlet is used for inputting an inert gas, and the annular concavity is used for dispersing the inputted inert gas.
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