Fluorine is used in toothpaste to help prevent cavities.
A chemical element that is a pale yellow gas and is very reactive.
The factory produces fluorine compounds for industrial use.
A substance containing fluorine, often used in various chemical processes.
ជាមួយនឹងវចនានុក្រមរូបភាព និងកាតប្លាសស្កាតដ៏មានអានុភាពដោយឥតគិតថ្លៃ។
