Chemical additives for oils; Color-brightening chemicals for industrial purposes; Oil-purifying chemicals; Oil-separating chemicals; Synthetic resins, unprocessed; Water-purifying chemicals; Waterproofing chemical compositions; Chemical preparations in the nature of filtering materials in water processing; Chemical preparations to prevent mildew; Chemical products for preventing scale

'addit':2 'brighten':7 'chemic':1,8,15,19,26,28,30,41,46 'color':6 'color-brighten':5 'composit':29 'filter':36 'industri':10 'materi':37 'mildew':45 'natur':34 'oil':4,13,17 'oil-purifi':12 'oil-separ':16 'prepar':31,42 'prevent':44,49 'process':40 'product':47 'purifi':14,25 'purpos':11 'resin':21 'scale':50 'separ':18 'synthet':20 'unprocess':22 'water':24,39 'water-purifi':23 'waterproof':27

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