Based on the mechanism of heat generation at the welding interface, welding methods for thermoplastics can be classified as external and internal heating methods, as shown in Fig 1. Fig. 1. Classification of welding methods for semi-finished polymeric materials.
ritalin is the brand name of the drug methylphenidate hydrochloride doctors prescribe ritalin to treat attention deficit hyperactivity disorder adhd and a sleep disorder known as narcolepsy
Ritalin is the brand name of the drug methylphenidate hydrochloride. Doctors prescribe Ritalin to treat attention deficit hyperactivity disorder (ADHD) and a sleep disorder known as narcolepsy.Ritalin is in a class of medications called central nervous system stimulants (CNS stimulants).t is used to treat attention deficit hyperactivity disorder (ADHD), attention deficit disorder (ADD), and narcolepsy. Ritalin helps to increase attention and control symptoms such as hyperactivity and impulsiveness.