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TXFK-R 型紧急放空人孔

更新:2015/9/28 17:21:15      
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紧急放空人孔是快速泄压装置,其技术性能、主要零部件材料与呼吸人孔相同。 
Emergency Vent Manhole Cover is a kind of rapid relief-pressure device. Its technical performance, 
main material and main parts material are the same as breather manholes. 



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