enhanced tractor tug. a very powerful tug boat with cycloidal drive (Voith-Schneider) systems, fire fighting system, and towing winches. The cycloidal drive system consists of revolving vertical blades having a variable pitch that can produce a propelling force in any horizontal direction. An ETT is capable of applying a greater than its maximum propulsion force when it uses its keel to skeg. The Nanuq and Tan’erliq are the two ETT’s used in Prince William Sound.

Empresas de Trabajo Temporal

Endo-Tracheal Tube

exercise treadmill test female grams

See exercise tolerance test.

ETL is sometimes referred as ETT- Extraction, Transformation and Transportation. It is a series of batch interface between the systems.

Electric Train Tablet (a method of single-line block control)

Engineering Training Team

See event-triggered tracking.