Mucus buildup. I have been having a problem with excessive mucus buildup in my lungs. I have to clear my lungs of phlegm about every 5-10 minutes which can get pretty annoying for other people. I have been having this problem for about 5 years now.
DIN is a German standard developed to test products ranging from doorbells to kitchen sinks. Floor surfaces, such as tile, synthetic, carpet and hardwood are included.DIN is analogous to U.S. standards like ASTM and UL.Products can be tested against DIN standards by one of two bodies: The Otto Graph Institute in Germany or the USSL in the United States.IN is analogous to U.S. standards like ASTM and UL. Products can be tested against DIN standards by one of two bodies: The Otto Graph Institute in Germany or the USSL in the United States.
It was adopted as an international standard in 1984. Head units generally come in either single DIN (180 x 50 mm panel) or double DIN (180 x 100 mm panel) size. The depth is not standardized. The US standard for a DIN radio is 2 x 7 and the Double DIN sized radio is a 4 x 7. Source(s): Wikipedia.