Chemical preparations, namely, metal colloid, noble metal colloid, metal nano-colloid, noble metal nano-colloid, colloidal solution of metal, colloidal solution of noble metal, nano-colloidal solution of metal, nano-colloidal solution of noble metal; all for use as catalyst, and for use as materials of catalyst

'catalyst':44,51 'chemic':1 'colloid':5,8,12,17,18,22,29,35 'materi':49 'metal':4,7,9,14,21,26,32,39 'name':3 'nano':11,16,28,34 'nano-colloid':10,15,27,33 'nobl':6,13,25,38 'prepar':2 'solut':19,23,30,36 'use':42,47

metals in powder form for painters, decorators, printers and artists; noble metals in powder form for painters, decorators, printers and artists

'artist':10,21 'decor':7,18 'form':4,15 'metal':1,12 'nobl':11 'painter':6,17 'powder':3,14 'printer':8,19

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