electronic detecting, sensing, measuring, tracking and guidance tools, namely, electronic instruments with radio transmitters and receivers that are used to guide earth drilling bores through measuring while boring underground the location, direction, pitch and roll, depth, inclination and condition of the bore head

'bore':24,28,42 'condit':39 'depth':36 'detect':2 'direct':32 'drill':23 'earth':22 'electron':1,10 'guid':21 'guidanc':7 'head':43 'inclin':37 'instrument':11 'locat':31 'measur':4,26 'name':9 'pitch':33 'radio':13 'receiv':16 'roll':35 'sens':3 'tool':8 'track':5 'transmitt':14 'underground':29 'use':19

DRILLTRACK

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