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physical object > natural object > celestial body > star > hydrogen-deficient star > hydrogen-deficient early type star

hydrogen-deficient early type star comparison table

Subject	is a kind of	has definition	has spectral type
hydrogen-deficient star	star
hydrogen-deficient early type star	hydrogen-deficient star	Early type star of type O, B or A in which the hydrogen lines are very weak or absent.	O star, B star or A star

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