The metal flap swung open in front of him, then travelled down his back as he crawled into the tunnel.

There was a small panel in each door, set about eye level, with a metal flap which closed shut over it.

Over time, dragging equipment detectors metal flaps need to be replaced because of extensive damage to them.

He took hold of two metal flaps centered on the short sides, pulled them sharply to fold down, and the lid came free.

It was a tiny metal flap, exactly like the cover of a mail box.

But he walked to the metal flap, lifted it, and allowed his gun to fall into darkness.

Between the metal flap and the lock there was just woom.

Something went spung, and a metal flap snapped up inside the crown.

She released the metal flap and heard an echo of its clank somewhere within.

He lifted a small metal flap which had been built into the floor of the fireplace.