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 should be used as a part of a total treatment program for ADHD that may include counseling or other therapies. RITALIN is also used in the treatment of a sleep disorder called narcolepsy.RITALIN is a federally controlled substance (CII) because it can be abused or lead to dependence.