I am a plumber with 20 years of experience in the field of refrigeration and heating, I am now working freelance for 13 years, I started my studies in 1992 to 2002, I entered a plumber company in 2003 until 2006, then I studied for a year in the field of plumber and welder, I took a certificate from the state, I worked with a plumber contractor for 2 years as a currency supervisor, and then I went out to work freelance until now, installing and repairing air conditioners and all heaters.