The inflammable, explosive, toxic or radioactive medium is allowed to leak, so the valve must have a reliable sealing performance.
对于易燃易爆、有毒或有放射的介质，外漏更是不能允许的，因而阀门必须具有可靠的密封性能。
The inflammable, explosive, toxic or radioactive medium is allowed to leak, so the valve must have a reliable sealing performance.
对于易燃易爆、有毒或有放射的介质，外漏更是不能允许的，因而阀门必须具有可靠的密封性能。
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