Cannot understand this corollary on surreal numbers

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Anixx
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I cannot understand a corollary from this paper on surreal numbers:

Corollary B. Assuming CH (the Continuum Hypothesis), every maximal Hardy
field is isomorphic as an ordered differential field to the ordered field No(ω1) of
surreal numbers of countable length

Does it say that there are no countable surreal numbers greater than the germs of Hardy fields?
 

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