Other kinds of welding. Some kinds of welding do not use an electric arc. They might use a flame, electricity without an arc, an energy beam, or physical force. The most common type of welding that does not use an arc is called gas welding.
TDW - Total Diamond Weight. A term usually used when there is more than one diamond in a particular piece of jewelry. The combined weight of all of the (diamond) stones.
TD is a late onset adverse effect of standard antipsychotic therapy. It is typified by involuntary hyperkinetic, choreo-athetoid movements of the orofacial, limb and truncal regions, and occurs in 15-20% of predisposed patients.