除非闻到煤气味或认为煤气正在泄漏，不用关掉煤气阀门。
Leave the gas on at the main valve, unless you smell gas or think it \ 's leaking.
煤气阀门的密封面，石油机械、管接头密封面、装配法兰等。
Sealed surface of gas valve, patrol machines, and installation flange.
利用模糊控制器的模糊推理能力来实现煤气阀门开度在线调整，以达到优化控制的目的。
It can use the fuzzy theory of the controller to realize the adjustment of the valve, which can make it control better.
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