sealing surface

例句：

1. 1. The engineersealed the surface of the tank with aspecial compound.
   工程师用一种特殊的化合物密封了水箱的表面。
2. 2. The new paint will provide asmoother, more sealed surface for thecar.
   新的油漆将为汽车提供更平滑、更密封的表面。
3. 3. The sealing surfacemust be perfectly flat to prevent leaks.
   密封表面必须完全平整以防止泄漏。