Toung challard focuses on the development and production of profluorinated polyethers (pfcs) oils, dry cortex oils, nanopaints, perfluorinated oils, electronic fluorinated liquids, etc. That replace foreign brands (dubon, suway, molik, krub), etc., and provides blank packages and formal invoices. To reduce your budget by 40-60% or more, you are entitled to "international quality in domestic prices"