Hand tools, namely, core samplers in the nature of tubular-shaped hand tools for extracting and measuring vertical core filter media samples from gravity water filter media such as sand, anthracite, or garnet as used in water treatment facilities

'anthracit':32 'core':4,20 'extract':16 'facil':40 'filter':21,27 'garnet':34 'graviti':25 'hand':1,13 'measur':18 'media':22,28 'name':3 'natur':8 'sampl':23 'sampler':5 'sand':31 'shape':12 'tool':2,14 'treatment':39 'tubular':11 'tubular-shap':10 'use':36 'vertic':19 'water':26,38

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