| 摘要 |
<p>The invention relates to a base for a transportable mast comprising a plurality of superimposed tubular mast elements, the base comprising a guide shaft with an opening for guiding the displacement of the tubular mast elements, legs connected to the guide shaft, for positioning the guide shaft at a distance above ground. The invention also relates to a mast assembly comprising the base, and a field base for limiting movement of the mast, and a guy control assembly for keeping the mast upright during erection or retraction of the mast.</p> |
