油ゆ密みつ

noun which may take the genitive case particle 'no'

oil-tight

Technical term used in engineering to describe seals, joints, or containers that prevent oil leakage.

• この油ゆ密みつシールは高こう温おんでも漏もれない。

  This oil-tight seal does not leak even at high temperatures.

• 油ゆ密みつ構こう造ぞうのため、内ない部ぶに油あぶらが浸しん入にゅうしない。

  Because of its oil-tight construction, oil does not enter the interior.