| 摘要 |
<p>A valve which includes a stud (14), fixed to a device (12) which is to be pressurised, a coupler member (16) which is connected to a pressurised water source and an arrangement which retains the coupler member engaged with the stud and which breaks, causing the coupler member to disengage from the stud, when the pressure in the device is at a design value.</p> |
