gasoline and electrically powered surface planning machines; augers designed for use with digger derrick-type, truck-mounted rigs; and earth drills that attach or couple to and operate from the auxiliary hydraulic system of prime mover vehicles

'attach':25 'auger':8 'auxiliari':33 'coupl':27 'derrick':15 'derrick-typ':14 'design':9 'digger':13 'drill':23 'earth':22 'electr':3 'gasolin':1 'hydraul':34 'machin':7 'mount':19 'mover':38 'oper':30 'plan':6 'power':4 'prime':37 'rig':20 'surfac':5 'system':35 'truck':18 'truck-mount':17 'type':16 'use':11 'vehicl':39

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