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for subject
Refrigeration
containing
4
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all forms
English
Chinese
³He⁻
⁴
He dilution refrigeration
³He⁻⁴ He 稀释制冷
³He⁻
⁴
He dilution refrigerator
³He⁻⁴ He 稀释制冷机
helium
4
4 氦
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