Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; laboratory equipment, namely, microscope slides; oculars, optical lenses; [ telescopes, astronomical spectrographs; educational apparatus, namely, a transparent tank used as a teaching aid for the chemical process of making alternative fuels; ] microscopes

'adapt':18 'aid':44 'altern':51 'apparatus':2,35 'astronom':32 'chemic':47 'diopter':17 'dome':11 'educ':34 'equip':24 'fuel':52 'instrument':4 'laboratori':23 'lens':19,30 'make':50 'microscop':26,53 'name':5,25,36 'ocular':28 'optic':1,6,29 'photographi':10,15,22 'port':7,12 'process':48 'slide':27 'spectrograph':33 'tank':39 'teach':43 'telescop':31 'transpar':38 'underwat':9,14,21 'use':40 'wet':16

OPTO-EDU

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