Faulty high pressure cut-off switch.

高压截止器开关出故障。

youdao

Lose, basically in high pressure cut-off valve leakage.

保不住，基本上就是高压截止阀发生内漏了。

youdao

Third, high pressure cut-off valve and pressure relief valve is broken, the inside outside leakage or leakage happened.

第三，高压截止阀或者泄压阀坏了，即发生了内泄漏或者外泄露。

youdao

While other attempts are planned to block the hole, it is probable that oil will continue to pour from it for another couple of months, until relief wells are drilled to intersect and reduce the pressure in the currently flowing well and cut-off the leakage of perhaps 50 million barrels of oil contained there by the injection of concrete deep into the seabed.

FORBES: Blame Big Bad BP For Now, but Where Is the Next Oil to Come From?