Calibrating devices for calibrating atomic absorption spectrometers; Filters for ultraviolet rays, for photography; Magnifying peepholes for doors; Measuring apparatus, namely, sizers for logs; Meteorological balloons; Carpenters' rules; Carpenters' folding rules; Circular slide rules; Measuring rules; Slide rules; Tool measuring instruments

'absorpt':6 'apparatus':19 'atom':5 'balloon':25 'calibr':1,4 'carpent':26,28 'circular':31 'devic':2 'door':17 'filter':8 'fold':29 'instrument':40 'log':23 'magnifi':14 'measur':18,34,39 'meteorolog':24 'name':20 'peephol':15 'photographi':13 'ray':11 'rule':27,30,33,35,37 'sizer':21 'slide':32,36 'spectromet':7 'tool':38 'ultraviolet':10

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