Sentence example with the word 'refractors'

refractors

Last update: August 4, 2015


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In recent years no noteworthy refractors have been mounted on Great this plan; but type A has been chosen by Grubb for the Me!- great Melbourne reflector, of 48-in.   [Please select]

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Let them lift their vast reflectors or refractors to the skies, and detect new planets in their hiding places.   [Please select]

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refractories - refractors - refractory