The basket has an opening through which a spectator can insert a retrieved foul ball (18) and has a flapped opening through which an umpire can collect the ball (18) as needed.

Each locking flap defines a through opening.

Standard double-wing doors are mechanical and they can be equipped with an Automatic Door Handle system.

It is the double leaf doors that allow a greater opening.

The plug can have an opening so as to allow continuous injection flow as the flapper is operated.

A sound channel is arranged in the flip for guiding sound from at least one speech opening (54, 62) in the flip to a microphone (24) located in the apparatus.

The basket has an opening through which a spectator can insert a retrieved foul ball (18) and has a flapped opening through which an umpire can collect the ball (18) as needed.

The flapper valve includes a flapper (27) attached to the valve actuator.

At least one lateral outlet opening for releasing a support element of a door leaf is arranged in the rail profile at a distance from the expanding clamp.

The invention relates to an illuminating device (40) for illuminating the region of a door opening (14) which is to be closed by a door leaf (20).

The fixed wing (2) further has a rigid bottom locking bar (11) which engages a matching opening in the floor when the fixed wing (2) is closed.

On a second opening the key retracts automatically into the original position thereof, driven by the spring of the leaf.

Standard double-wing doors are mechanical and they can be equipped with an Automatic Door Handle system.

An insert assembly is used in the modular saddle flapper valve assembly which has a flapper seat, flapper valve and sleeve.

The oven comprises a single opening for charging purposes which is obturated by a series of leaves of small longitudinal superposed doors, the lower edge (17) of a leaf covering the upper edge (16) of an immediately lower leaf.