单词 | oil boiler |
释义 | oil boiler Replace your oil boiler with one and you will be swapping an oil bill for higher electricity bills. Times, Sunday Times Every time a gas/oil boiler stops, it has to be purged with cold air to remove any combustible gases that may have accumulated in the boiler before restarting. Retrieved from Wikipedia CC BY-SA 3.0 In between the boilers were converted into furnace oil boilers and again back to coal boilers. Retrieved from Wikipedia CC BY-SA 3.0 |
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