- published: 09 Dec 2012
- views: 81892
An airlock is a device which permits the passage of people and objects between a pressure vessel and its surroundings while minimizing the change of pressure in the vessel and loss of air from it. The lock consists of a small chamber with two airtight doors in series which do not open simultaneously.
An airlock may be used for passage between environments of different gases rather than different pressures, to minimize or prevent the gases from mixing.
An airlock may also be used underwater to allow passage between an air environment in a pressure vessel and a water environment outside, in which case the airlock can contain air or water. This is called a floodable airlock or an underwater airlock, and is used to prevent water from entering a submersible vessel or an underwater habitat.
Before opening either door, the air pressure of the airlock—the space between the doors—is equalized with that of the environment beyond the next door to open. This is analogous to a waterway lock: a section of waterway with two watertight gates, in which the water level is varied to match the water level on either side.
I am small but I can see
I am weak but I can feel
You do what you want to do
You say what you want to say
And then when the times are bad
You're down upon your knees
Is it too much to empathize
Just realize
And he will break through you
And he will break through you
To go to the other end
He will follow you
Who's telling me
Who's telling me
Why tell me
To look the other way
Who's telling me
Who's telling me
Why tell me
To look the other way
We seem to talk far too much
And I find myself asking where has all the love gone
You know so well how to hate
You know so well how to complicate
Who's telling me
Who's telling me
Why tell me
To look the other way
Who's telling me
Who's telling me
Why tell me
To look the other way
And he will break through you
And he will break through you
To go to the other end
He will follow you
Who's telling me
Who's telling me
Why tell me
To look the other way
Who's telling me
Who's telling me
Why tell me
To look the other way
I am small but I can see
I am weak but I can feel
I am small but I can see
I am weak but I can feel
I am small but I can see