EXCAVATION EQUIPMENT, NAMELY PORTABLE EXCAVATION UNITS, EACH COMPOSED OF A TANK PARTITIONED INTO TWO CHAMBERS, ONE CONTAINING WATER, THE OTHER FOR DEBRIS AND DIRT, A DISPLACEMENT VACUUM PUMP, AND TWO HOSES, ONE USED TO DISCHARGE PRESSURIZED WATER AND THE OTHER USED TO VACUUM THE RESULTING DEBRIS INTO THE TANK

'chamber':15 'compos':8 'contain':17 'debri':22,46 'dirt':24 'discharg':35 'displac':26 'equip':2 'excav':1,5 'hose':31 'name':3 'one':16,32 'partit':12 'portabl':4 'pressur':36 'pump':28 'result':45 'tank':11,49 'two':14,30 'unit':6 'use':33,41 'vacuum':27,43 'water':18,37

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