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.
The definition of TDY is Temporary Duty. The term is commonly used for short term assignments lasting a few days to up to 180 days, but varies according to Army, Navy, Air Force, Marine Corps, or Coast Guard regulations for each military service or government organization.ypically a Service Member on TDY assignment will receive per diem for lodging and for meals & incidentals. Lodging is reimbursed up to the maximum lodging rate, and meals are paid at a flat rate. Per diem rates vary significantly by geographic location.