There is about a metre of ice on the surface and the lowest temperature has been minus 35 degrees Centigrade but with the wind chill, it can go down to about minus 70-80c.
地表的冰厚度达到1米左右，最低温度为零下35摄氏度，但是因为有风寒，温度可降至零下70至80摄氏度左右。
Effects of different tempering processes on surface microstructure of indefinite chill cast-iron roller were studied.
研究了回火工艺对无限冷硬轧辊表层基体组织的影响。
The hardness and depth of chill layer on the roller outer surface can be raised with adding trace Bi into liquid Fe in centrifugal casting.
离心铸造时在铁水中加入微量的铋，可以提高滚筒外壳冷硬层的硬度和深度。
The hardness and depth of chill layer on the roller outer surface can be raised with adding trace Bi into liquid Fe in centrifugal casting.
离心铸造时在铁水中加入微量的铋，可以提高滚筒外壳冷硬层的硬度和深度。
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