H, H, are trap doors, to let hay or straw down to the alleys of the stables beneath.
The passage is, between the mangers, 3 feet wide, to receive the hay from the trap doors in the floor above.
Did they know of any underground vaults or trap doors, or any buildings apart from those in the encampment?
The Germans had placed barricades, trap doors, and traps of all kinds in it.
Pits with trap doors are also used to prevent an enemy from creeping up the tunnel to the fire trench.
In some houses there were trap doors through which, in case of danger, he might descend.
He also had large numbers of prisoners put on board vessels with trap doors for bottoms, and sunk in the Loire.
“Junction showing now,” he said as Bob stepped in after inspecting the trap doors on the observation platform.
These, as they could not be shot, were caught in large deep pits with trap doors.
Lin Soo nodded; it was a habit, and when he did so his cheeks flapped and his eyelids fell up and down like trap doors.