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
RitalinÂ® (methylphenidate hydrochloride) is a prescription medication licensed to treat attention deficit hyperactivity disorder (ADHD) in children and teenagers. The drug is not approved for use in adult ADHD, although it is approved to treat narcolepsy in adults.