2 Pressure Relief Valve

pressure relief
Stress management is the amelioration of stress and especially chronic stress often for the purpose of improving everyday functioning.
What you must do to all fuel injection system before cracking a line and opening up the system
or ‘weight shifts’ are the methods of relieving pressure over the buttocks whilst sitting in the wheelchair.

valve
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
control consisting of a mechanical device for controlling the flow of a fluid
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow

2
.2 Network (pronounced Dot-Two Network) is the name of an upcoming television network designed for digital television subchannels (hence the ".2") owned by Guardian Enterprise Group that will replace the GTN network on a date yet to be announced.
two: the cardinal number that is the sum of one and one or a numeral representing this number
two: being one more than one; "he received two messages"