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.
transferable development rights (TDR). A zoning and land planning tool often used to preserve undeveloped or culturally significant areas. Typically, the local government will identify an area it wants to retain in a natural state, such as farmland, called the sending area. zoning and land planning tool often used to preserve undeveloped or culturally significant areas. Typically, the local government will identify an area it wants to retain in a natural state, such as farmland, called the sending area.