Air brakes and self-opening and self-closing doors on cars are operated by means of compression pumps.
He is made of self-closing jelly, and when you take the knife out the gap shuts up again.
It must be located in loft above scenery, and be installed in a suitable iron box with a tight, self-closing door.
The door to the operating room should open outward and be self-closing.
In fly season, trenches may be closed with seats covered down to the ground with muslin and supplied with self-closing lids.
If the hot water is from the public water works, a self-closing cock should be used.
It is part of the city regulations that all connections of this kind be self-closing.
Usually applied to real estate transactions, it refers to delivery of the deed of ownership from the owner to the buyer in return for full payment.