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 labels TC and TD mean to contain and to dispense respectively. What this means is that glassware can either be calibrated for the purpose of containing a solution or f â¦ or the purpose of transferring and dispensing a solution. Most flasks will be labeled TC while most pipets and burets will be labeled TD.