chris collister Apr 1, 2012:

Attention! It is indeed (probably) a "mast", but context is all. The very large towers on which wind turbines are built are known as "mâts", though such large structures would not be described as such in EN, rather as "towers". On the other hand, the much smaller "masts" which are used to survey the wind regime of the site are also "mâts". This company seems to specialise in highly stressed composite structures, so it could be either, or even masts for sailing.