This paper analyzes the failures of air operated double position butterfly valve used in car type furnace, and puts forward improving plan.

本文对台车炉气动双位蝶阀产生的故障进行了分析，并提出了改进方案。

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This furnace dwelling was designed to do double duty as a living classroom.

这座大锅炉房还有另一重任务，就是作为生物课堂。

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This paper introduces the application and method of implementing of Digitronik SDC40B in double cross limit combustion control mode of heat treating furnace.

本文讨论了SDC40 B可编程数字调节器在热处理炉双交叉限幅控制方式中的应用。

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But the new furnace means production capacity at Port Talbot will double to make it capable of making more than four million tonnes of steel a year.

BBC: Tata Steel's ?185m Blast Furnace No 4 starts up