automatic safety valve造句

Appellant's counsel therefore disclaimed any right to the exclusive use of an automatic safety valve, and said : " We do not claim the valve any further than in this combination with a steam fire engine ."
Upon this state of facts, it was plain that the mere employment by the defendants of the old and well known automatic safety valve afforded no ground upon which to base the relief prayed for in the appellant's bill.
A spokeswoman for the ministry said that no automatic safety valves were ever installed as a precaution should a leak occur, and further charged EAPC with failing to ensure that it had vehicles capable of negotiating the terrain fast enough to deal with the leak before the fuel had a chance to be absorbed by the soil.
It's difficult to find automatic safety valve in a sentence. 用automatic safety valve造句挺难的