| style="border: 1px solid white; border-bottom: 2px solid #E8E8E8; text-align: center; vertical-align: center; background: white;" |Gage pressure of compressed air or fluid in vehicle braking system measured at the brake chamber when brake shoe (or pad) is placed against brake drum (or disc). | | style="border: 1px solid white; border-bottom: 2px solid #E8E8E8; text-align: center; vertical-align: center; background: white;" |Gage pressure of compressed air or fluid in vehicle braking system measured at the brake chamber when brake shoe (or pad) is placed against brake drum (or disc). |