如果可能的话，从外面的主阀门关掉煤气。从邻居家给天然气公司打电话让他们处理。
Turn off the gas, using the outside main valve if you can, and call the gas company from a neighbor \ 's home.
订购手轮或链轮执行器时，要在主阀门订购代码基础上增加适当的执行器订购代码。
To order handwheel or chainwheel actuators, add the appropriate order code to the basic valve order code.
据报道，因为管道主阀门在爆炸中已被损坏，消防人员花了几个小时才阻止了煤气的渗漏。
According to the report, it took firefighters hours to stop the leak because the pipeline's main valve was damaged in the explosion.
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