Depressing a key lets this pressure exhaust, which collapses the pneumatic and opens the pipe's valve.
This collapses the pneumatic, opening the pipe's valve. Depressing a key lets this pressure exhaust.
Depressing a key lets this pressure exhaust. This collapses the pneumatic, opening the pipe's valve.
Depressing a key lets this pressure exhaust. This collapses the pneumatic, opening the pipe's valve.