The coolingring is a sophisticated part with a large diameter, which has to meet a relatively high technical specification.
冷却环是一个直径较大，技术要求较高的复杂备件。
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Meanwhile, the cooling system that circulates superfluid helium around the LHC's accelerator ring keeps the machine at minus 271.3 degrees Celsius (minus 456.34 degrees Fahrenheit).
Workers are still finishing cooling down the eight sectors of the LHC, which are defined by eight points along the ring where protons may enter or collide.