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. 2014 Feb 28;52(3):190–198. doi: 10.2486/indhealth.2013-0117

Fig. 2.

Fig. 2.

(a) paper bags are filled with fumed silica by a packing machine (b) mobile cart for nanoparticle exposure assessment in fumed silica factory (c) pouring the sol-gel silica powder into the injection hole of jet mil and show the mobile cart