Drilling machines, parts and accessories for drilling machines, namely, disc cutters, cutter rings, [ cutting heads,] and various attachments to a tunnel-boring machine in the nature of scraper tools, [ breaker tools, ripper tools,] and shoe-type scraper tools; drilling rollers, namely, bearings used in drilling machines [; and drilling heads ]

'accessori':5 'attach':18 'bear':44 'bore':23 'breaker':31 'cut':14 'cutter':11,12 'disc':10 'drill':1,7,41,47,50 'head':15,51 'machin':2,8,24,48 'name':9,43 'natur':27 'part':3 'ring':13 'ripper':33 'roller':42 'scraper':29,39 'shoe':37 'shoe-typ':36 'tool':30,32,34,40 'tunnel':22 'tunnel-bor':21 'type':38 'use':45 'various':17

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