1. 
   Tubing
   The steel tubular elements in the center of the well, by which the effluent is evacuated to the surface. Tubing is nornally differentiated from casing by the fact that it is not always permanently installed.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   tubing
   relatively small-diameter pipe that is run into a well to serve as a conduit for the passage of oil and gas to the surface.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
3. 
   Tubing
   • (n.) The act of making tubes. • (p. pr. & vb. n.) of Tube • (n.) A series of tubes; tubes, collectively; a length or piece of a tube; material for tubes; as, leather tubing.
   Found op http://thinkexist.com/dictionary/meaning/tubing/
   
   
4. 
   Tubing
   [recreation] Tubing (also known as inner tubing or even toobing) is a recreational activity where an individual rides on top of an inner tube, either on water, snow, or through the air. The tubes themselves are also known as "donuts" or "biscuits" due to their shape. ==Variations== ===Water=...
   Found op http://en.wikipedia.org/wiki/Tubing_(recreation)
   
   
5. 
   TUBING
   Increasingly used in hillside sugar bushes, plastic tubing conveys the sap directly from each tree to holding tanks. Some lines are a mile or more long and may connect 500 or more taps to a single tank.
   Found op http://www.hallfarms.com/sweettalk
   
   
6. 
   tubing
   1) Conduit 2) Hoses 3) River sporting activity 4) Tire filler 5) Tube
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/tubing/1
   
   

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