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| 回覆中加入附件並不會使你增加積分,請使用主題方式發佈附件。 During last week's polar vortex deep freeze in Chicago, Illinois, USA, more than half of the Metra and Amtrak train were cancelled. Some of the rail switches were frozen and trains could not be switched to the right track. There was not ehough defrosting fire burning equipment to maintain the safe operation of the rails and switches. With day time high temperature of -15 degree F, and feel like -50 degree F with wind chill, lot of things were frozen solid. Some water main pipe were broken due to frozen water expansion. It was a big mess.... |
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