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
Three Parts: Be Honest With Yourself Talk to a Doctor Proper Use. Adderall is a prescription medication that is used to treat ADHD (attention deficit hyperactivity disorder) in children and adults.The drug is a central nervous system stimulant that is believed to improve attentiveness, organization, and performance in people who have chronic trouble staying focused.eep it to yourself. Adderall and Ritalin are among the most commonly abused prescription drugs, especially among students. Remember that you were prescribed this medicine for a reason, and that giving it or selling it to others is unethical and may put their health at serious risk.