hermetically sealed casing

例句：

1. 1. Theengineer used a special tool to hermetically seal the container.
   工程师使用特殊的工具来密封容器。
2. 2. The hermetic sealing casing is crucial for the safety of the chemical products.
   密封壳体对于化学品的安全至关重要。
3. 3. The hermetically sealed casing prevents leakage and ensures the product's quality.
   密封壳体防止泄漏，确保产品的质量。