火山就像释放压力的巨大安全阀。

Volcanoes are like giant safety valves that release the pressure.

我们需要更换旧的风阀。

We need to replace the old air valve.

这个截止阀控制水流。

This stop valve controls the water flow.

我们需要更换旧的截止阀。

We need to replace the old stop valve.

这个风阀需要定期检查。

This air valve needs regular inspection.

截止阀坏了，需要修理。

The stop valve is broken and needs repair.

你知道截止阀的位置吗？

Do you know the location of the stop valve?

请确保风阀完全关闭。

Please ensure the air valve is completely closed.

请确保截止阀完全关闭。

Please make sure the stop valve is fully closed.

请确保止逆阀没有堵塞。

Please ensure that the check valve is not blocked.