During the inspection, the technician discovered that the lip seal on the gearbox shaft was worn and needed replacement.

The mechanic inspected the lip seals on the gearbox and recommended replacing them to prevent oil leaks.

When discussing the secret ceremony, one kept one's lips sealed, preserving the trust of the group.

By keeping one's lips sealed, the ambassador avoided creating a diplomatic incident.

To earn trust, a true friend keeps one's lips sealed when confidences are shared.

When it comes to office gossip, it's better to keep one's lips sealed than to spread rumors.