2. should study the amount of internal equipment, bacteria, as well as other types of karaoke keyboard computer, air conditioning service, users have the opportunity to touch and leads to get germs.
2. Should study the bacteria inside the karaoke type, such as a computer keyboard access. Users have the opportunity to experience. And lead to disease.
2. Should study the bacterial and other types of equipment within the karaoke, such as keyboard, computer, air conditioning, the user the opportunity to experience. Lead to get germs.