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 common name for methylphenidate, classified by the Drug Enforcement Administration as a Schedule II narcoticâthe same classification as cocaine, morphine and amphetamines.1 It is abused by teens for its stimulant effects.