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 (methylphenidate) is a central nervous system stimulant prescribed for treating narcolepsy (uncontrollable sleepiness), and attention-deficit hyperactivity disorder (ADHD).Ritalin is available as a generic drug.italin (methylphenidate) is a central nervous system stimulant prescribed for treating narcolepsy (uncontrollable sleepiness), and attention-deficit hyperactivity disorder (ADHD).