Vials toc vials waa weelal nadiif ah oo laga sameeyay oo laga sameeyay dhalada tayada leh ee tayo sare leh ama waxyaabo kale oo gudaha ah. Waxaa si gaar ah loo eegayaa in loo yareeyo khataraha wasakheynta ee la xidhiidha vials dhaqameedyada, hubinta in xitaa tirakoobka dareenka ah ee nijaasta ah aysan ka dhigin akhrinta TOC.
